Geology of the Venezuelan Guayana Shield at 1:500,000 scale; a digital representation of maps published by the U.S. Geological Survey [unknown]

Paul G. Schruben
1995 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr95493 fatcat:5tiu4vdyy5d4fkn7ozuik6tuh4