TY - MAP ID - 136029350 TI - Geology and resource assessment of the Venezuelan Guayana Shield at 1:500,000 scale : a digital representation of maps published by the U.S. Geological Survey AU - Schruben, Paul G. AU - Geological Survey (U.S.) PY - 1999 PB - Reston, VA. : U.S. Geological Survey, DB - UniCat KW - Geology KW - Minerals KW - Guiana Highlands UR - https://www.unicat.be/uniCat?func=search&query=sysid:136029350 AB - "Contains vector-based digital maps of Venezuela[n] Guayana Shield originally published as paper maps in 1993 USGS Bulletin 93-2062." ER -