Stuart, Edwin Roy, 1874- · New York, McGraw-Hill · leaf 128
9^0 ~6%2 678 Place 20 ft Contours on above sketchFig. 36.—Contour Problem £. i780 f*«l /OJ5 /O/O , 9/0 t ^3 ,< … /»</>> ?0 Contours Fig. 37.—Contour Problem C. 114 MAP READING AND TOPOGRAPHICAL SKETCHING ebo .
Military sketching · Maps, Military
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