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1. Rock and gem

پدیدآورنده : Bonewitz, Ra.,Ronald Louis Bonewitz ; consultants, Margaret Carruthers, Richard Efthim

کتابخانه: Library and Documentation Center of Kurdistan University (Kurdistan)

موضوع : ، Rocks,، Gems,، Minerals

2. Rock and gem

پدیدآورنده : Bonewitz, Ronald Louis

کتابخانه: (Semnan)

موضوع : ، Rocks,، Gems,، Minerals,، Fosils

پدیدآورنده : Bonewitz, Ra.,Ronald Louis Bonewitz ; consultants, Margaret Carruthers, Richard Efthim