Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Bögel, Hellmuth and Sinkankas, John and Caspari, Claus and Fejer, Eva and Walker, Patricia",The studio handbook of minerals : a guide to gem and mineral collecting,,Viking Press,1972,A Studio book,,067068015X,,https://cir.nii.ac.jp/crid/1130000794956659200