Armstrong, John H. The railroad, what it is, what it does : the introduction to railroading / John H. Armstrong ; edited by Marc Green. - Omaha, NE : Simmons-Boardman Pub. Corp., c1982 - iii, 250 p. : ill. ; 25 cm. Includes index. Bibliography: p. 225-233. LCCN: 78105455 Subjects--Topical Terms: Railroads. LC Class. No.: TF145 / .A75 Dewey Class. No.: 385 / ARM