TY - GEN AU - Stone, Paul. CN - I 19.76: CY - [Menlo Park, Calif.] : DA - 1990. ID - 241089 KW - Geology KW - Geology N1 - Distributed to some depository libraries in microfiche. N1 - Relief shown by contours and spot heights. N1 - "Contour interval 50 meters" N1 - "Geology compiled in 1988-1990" N1 - Includes text, index and quadrangle location maps. PB - U.S. Geological Survey, PP - [Menlo Park, Calif.] : PY - 1990. T1 - Preliminary geologic map of the Blythe 30ʹ by 60ʹ quadrangle, California and Arizona / TI - Preliminary geologic map of the Blythe 30ʹ by 60ʹ quadrangle, California and Arizona / VL - 90-497 ER -