Geologic map of the Ciudad Piar and part of the Ciudad Bolivar 2 0 x 3 0 quadrangles, Bolivar state, Venezuela [cartographic material] / by John H. Stewart, Félix Martínez, and William E. Brooks ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the Corporacion Venezolana de Guayana, Técnica Minera, C.A.

Author: Stewart, J. H., 1928-2013
Additional Titles: Title from margin of envelope: Geologic map, Ciudad Piar and part of Ciudad Bolivar quadrangles, Venezuela
Published: Reston, VA : The Survey, 1994.
Denver, CO : For sale by Map Distribution.
Physical Description: 1 map ; 55 x 66 cm, on sheet 86 x 107 cm, folded in envelope 30 x 24 cm.
Additional Creators: Martínez, Félix, Brooks, William E., Corporación Venezolana de Guayana. Técnica Minera, and Geological Survey (U.S.)