TY - BOOK ED - Carnegie Library of Pittsburgh. TI - Science and technology desk reference: 1,500 answers to frequently-asked or difficult-to-answer questions SN - 0810388847 (alk. paper) AV - Q173 .S397 1993 U1 - 500 20 PY - 1993/// CY - Washington, D.C. PB - Gale Research KW - Science KW - Miscellanea KW - Technology N1 - Includes bibliographical references (p. 639-666) and index ER -