TY - BOOK AU - Mercer,Ian TI - Crystals SN - 0113100132 AV - QD921 .M463 1994 U1 - 549.0747471 20 PY - 1994/// CY - Cambridge, Mass. PB - Harvard University Press KW - Crystals N1 - Cover title; Includes bibliographical references (p. [3] of cover) and index ER -