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746. Contour map (area plan, orthographic projection; positive photostat print); 18 3/16 x 18 15/16 inches, scale 1:1000; DR. 1; Annotated (blue, pencil).

747. Plan, sections (orthographic projections; geological maps; positive photostat print); 18 1/8 x 18 3/16 inches, horizontal scale 1:1000, vertical scale 1:50; DR. II; Shading (blue, pencil).