Clays and clay minerals
Conference on clays and clay minerals(15th:1966:Oct.10-13:Penusylvania)
Clays and clay minerals - Oxford Pergamon Press 1967 - ix,490p. 24 cm.
Roman
Clay minerals
553.61
Clays and clay minerals - Oxford Pergamon Press 1967 - ix,490p. 24 cm.
Roman
Clay minerals
553.61