A collector's guide to minerals and gemstones /
Boegel, Hellmuth.
Sinkankas, John.
Fejer, Eva.
Walker, Patricia.
Caspari, Claus.
London Thames and Hudson
1971
Pbk. £1.50. sbn 500-27012-0
Originally published as 'Knaurs Mineralienbuch' München (Munich): Droemersche, 1968
bibl p298-299
Mineralogy.