TY - BOOK ED - The Carnegie Library of Pittsburgh Science and Technology Department TI - Science and technology desk reference: 1,500 answers to frequently-asked or difficult-to-answer questions SN - 0810388847 AV - Q173 .S35 1993 U1 - 500 20 PY - 1993/// CY - Washington PB - Gale Research KW - Science KW - Technology KW - Desk References N1 - Includes bibliographical references and index ER -