TY - BOOK TI - SCIENTIFIC AMERICAN: READINGS IN THE PHYSICAL SCIENCES V-1 U1 - 550/SCI/V-1 PY - 1975/// PB - TARAPOREVALAL PUBLISHING INDUSTRIES PRIVATE LTD KW - 500 Science KW - 550 Earth sciences & geology KW - 550 Earth sciences KW - EARTH SCIENCE ER -