Spalding, George R. Training manual in topography, map reading and reconnaissance. Prepared by Major George R. Spalding... under the direction of the chief of engineers, U. S. Army. - Washington, Govt. Print. Off., 1917. - 151 p. incl. tabls, diagrs. 23 cm. LCCN: war17000147 Subjects--Topical Terms: Military topography.Military reconnaissance. LC Class. No.: UG470 / .S76