Gaya APA
Surjono, ., Clarke, . (1981).
Primary Tungsten Occurrences in Sumatera and the Indonesian Tin Islands (No.5.bul.vol.1.Januari 1982) .
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Gaya MLA
Surjono, ., Clarke, .
"Primary Tungsten Occurrences in Sumatera and the Indonesian Tin Islands (No.5.bul.vol.1.Januari 1982)".
:
,
1981.
Text.