Gaya APA
Gryc, G. (1988).
Geology and Exploration of The National Petroleum Reserve in Alaska 1974 to 1982 .
Alaska:
U.S. Geological Survey.
Gaya MLA
Gryc, George.
"Geology and Exploration of The National Petroleum Reserve in Alaska 1974 to 1982".
Alaska:
U.S. Geological Survey,
1988.
Text.