Zwaan, P. C. (1974). Garnet, corundum and other gem minerals from Umba, Tanzania. Rijksmuseum van Geologie en Mineralogie.
Chicago Style (17th ed.) CitationZwaan, P. C. Garnet, Corundum and Other Gem Minerals from Umba, Tanzania. Leiden: Rijksmuseum van Geologie en Mineralogie, 1974.
MLA (9th ed.) CitationZwaan, P. C. Garnet, Corundum and Other Gem Minerals from Umba, Tanzania. Rijksmuseum van Geologie en Mineralogie, 1974.
Warning: These citations may not always be 100% accurate.