TY  - BOOK
AU  - Ridgway,John L.
ED  - Geological Survey (U.S.)
TI  - The preparation of illustrations for reports of the United States Geological survey,: with brief descriptions of processes of reproduction
AV  - QE75 .I5
PY  - 1920///
CY  - Washington
PB  - Govt. print. off.
KW  - Illustration of books
ER  -