'Great Northern Semaphore', Volume 3, Number 10, October 1926, 44 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by W.N.S. Ivins. Articles include: Minot A Great Northern City, Forty Years Ago, Commercial Story of New England, Rushing Work on Chelan Project, Our Directors Arthur Curtiss James, Shopmen Grow Flowers in Cindery Desert, Patrick Kelly Passes On, Thron Anderson Honored, Young Paul Revere, Children?s Health Page, Club Activities, Current Events, Division News, Editorial, Fashions, Honor Roll, House Plans, Kiddies? Picture Page, Safety First, Veteran?s Corner, Women?s Page.

'Great Northern Semaphore', Volume 4, Number 10, October 1927, 44 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by Edward F. Flynn. Articles include: The Development of the Beet Sugar Industry, From Flower Girl to Artist, One of the Most Striking Achievements of Civilization, My Impressions of European Transportation, North Dakota in Retrospect, Kootenai Valley Idaho, A Century of Apples, Importance of Proper Containers, Children?s Health Page, Club Activities, Division News, Editorial, Honor Roll, Kiddies? Group, Meritorious Mention, Veteran?s Corner, Women?s Page.

'Great Northern Semaphore', Volume 5, Number 10, October 1928, 32 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by Edward F. Flynn. Articles include: The United States Constitution, Jump Off Joe Falls, Former Indian Fighter Touring Great Northern, Charming Picture Wins Prizes, Lake Ewauna Draw Bridge, Monument to Famous Cow, Great Northern Heater Cars, Great Northerner Builds Model Airplane, Children?s Health Page, Club Activities, Division News, Editorial, Honor Roll, Meritorious Mention, Safety First, Veteran?s Corner.

'Great Northern Semaphore', Volume 2, Number 9, September 1925, 44 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by W.N.S. Ivins. Articles include: Engine No. 2030, Attractive New Reception Room, The John F. Stevens Statue, Reorganizing Siberian Railway, The Chicago Freight Office, Say It With Service, Burning Weeds With the Woolery, Fire Prevention and Protection, Hicken's Hirsute Herring, The Best Ever - General Office Picnic. Children?s Health Page, Club Activities, Division News, Editorial, Fashions, Puzzles, Reminiscences, Safety First, Women?s Page, Veterans? Corner, Honor Roll, House Plans, Pullman Paragraphs, Kiddies? Picture Page.

'Great Northern Semaphore', Volume 3, Number 9, September 1926, 48 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by W.N.S. Ivins. Articles include: Spokane Capital of the Inland Empire, Columbia River Historical Expedition, Opheim Extension Completed, Minnesota?s Blind Incubator Baby, Indian Congress at Spokane, Brotherhood State Bank of Hillyard, Tulip Queen Travels, Business Getters, Children?s Health Page, Club Activities, Current Events, Division News, Editorial, Employes? Homes, Fashions, House Plans, Kiddies? Picture Page, Meritorious Mention, Safety First, Veteran?s Corner, Women?s Page.

'Great Northern Semaphore', Volume 4, Number 9, September 1927, 44 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by Edward F. Flynn. Articles include: Bend in Central Oregon, Thirty Days Abroad, Jackson Street Flower Growers, Interesting Days at Fisher?s Landing, Tacoma Poultry and Egg Center, ?Ontophalen? Great Success, Children?s Health Page, Club Activities, Division News, Editorial, Kiddies? Group, Meritorious Mention, Veteran?s Corner, Women?s Page.

'Great Northern Semaphore', Volume 5, Number 9, September 1928, 32 pages. A monthly publication of the Great Northern Railway Company, Saint Paul, Minnesota, it was edited by Edward F. Flynn. Articles include: James Jerome Hill, The City Marvelous, Excerpts from Address of President Ralph Budd at Helena Montana, The Pacific Salmon Part Two, Great Northern Establishes Plane Service, Children?s Health Page, Club Activities, Division News, Editorial, Veteran?s Corner.

The Northern Pacific Railway Historical Association Bibliography is a compilation of books, magazine articles, brochures, drawings, maps and other materials on Northern Pacific Railway topics.