Harrod's Librarians' Glossary (10th edition) defines a series as volumes usually related to each other in subject matter, issues successively, sometimes at the same price, and generally by the same publisher, uniform in style, and usually bearing a collective 'series title' on the Half title or the cover, or at the head of the Title-page.
The National Air and Space Museum Library has various series such as this title from the Advances in Space Research series, published for the Committee on Space Research (COSPAR), and this one title out of 106 from the Progress in Astronautics and Aeronautics series written by the American Institute of Aeronautics and Astronautics (AIAA).
However, one the library's most popular series is the Windsock Datafiles. Published by Albatros Productions in England, each Windsock Datafile provides detailed documentation of World War 1 airplanes. Each issue is packed with rare archival and close-up photographs, scale drawings,colors and markings data on a particular aircraft.
Windsock Datafile #115 Bristol Fighter by L.A. Rogers is just one of the 135 (and counting) of the datafiles in the National Air and Space Museum Library Reference collection.
Researchers have indicated that the Windsock Datafiles are an excellent reference for anyone interested in World War I aviation.