APA

Geological Survey (U.S.), . (1992). Mineral Resources of Puerto Rico: a mew [sic] Island-Wide Assessment, June 23-25,1992: a public meeting on mineral resource assessment. Washington: .

Chicago

Geological Survey (U.S.), . 1992. Mineral Resources of Puerto Rico: a mew [sic] Island-Wide Assessment, June 23-25,1992: a public meeting on mineral resource assessment. Washington: .

Harvard

Geological Survey (U.S.), . (1992). Mineral Resources of Puerto Rico: a mew [sic] Island-Wide Assessment, June 23-25,1992: a public meeting on mineral resource assessment. Washington: .

MLA

Geological Survey (U.S.), . Mineral Resources of Puerto Rico: a mew [sic] Island-Wide Assessment, June 23-25,1992: a public meeting on mineral resource assessment. Washington: . 1992.