The preparation of illustrations for reports of the United States Geological survey : with brief descriptions of processes of reproduction (1920)
Ridgway, John L. (John Livesy), b. 1859, United States. Dept. of the Interior, Geological Survey (U.S.) · Washington, D.C. : Government Printing Office · leaf 80
62 PREPAKATION OF ILLUSTRATIONS, order to produce uniformly even spacing. The application of six o! these conventional patterns to a base map is shown in figure 9. FiaoRB 9. — Map bearing six areal line patterns.
Topographical drawing · Map drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
