Pabian, Roger K. Agates : treasures of the earth / Roger Pabian with Brian Jackson, Peter Tandy & John Cromartie. - Richmond Hill, Ont. : Firefly Books, 2006. - 184 p. : ill., maps ; 22 cm. Includes bibliographical references and index. ISBN: 1554070988 Standard No.: 9781554070985 Subjects--Topical Terms: Agates. Dewey Class. No.: 553.8/7