International strategic minerals inventory summary report--zirconium /
by R. R. Towner.
- Washington : U.S. Government Printing Office, 1992
- vi, 47 p. : ill., maps ; 28 cm.
- U.S. Geological Survey circular ; 930-L .
Prepared as a cooperative effort among earth-science and mineral-resource agencies of Australia, Canada, the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States of America