Army Service Schools (U.S.)1 map : color; 33 x 28 cmScale 1:633,600. 1 in. = 10 miles. ; Relief shown by hachures.; 'Location of G.S. sheets in blue.'9980782833502441ark:/81985/n2319v32qArmy Service SchoolPublicGeneral map, Gettysburg-AntietamMapsPennsylvania--Gettysburg Region1913Northwestern University