TY  - BOOK
AU  - Whitmore,Frank C.
AU  - Williams,M.E.
ED  - United States
TI  - Resources for the twenty-first century: proceedings of the international centennial symposium of the United States Geological Survey, held at Reston, Virginia, October 14-19, 1979 / 
U1  - 550 
PY  - 1982///].
CY  - [Washington]: 
PB  - [United States Government Printing Office], 
KW  - Earth sciences
KW  - Congresses
KW  - Natural resources
N1  - Includes bibliographical references
ER  -