(1937). Vol. 32, № 6-8; Economic Geology. 1937.
Chicago Style aipamenaVol. 32, № 6-8; Economic Geology. 1937, 1937.
MLA aipamenaVol. 32, № 6-8; Economic Geology. 1937, 1937.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1937). Vol. 32, № 6-8; Economic Geology. 1937.
Chicago Style aipamenaVol. 32, № 6-8; Economic Geology. 1937, 1937.
MLA aipamenaVol. 32, № 6-8; Economic Geology. 1937, 1937.