SCIENCE, SPACE, AND TECHNOLOGY Printed for the use of the Committee on Science, Space, and Technology 25-278 U.S. GOVERNMENT PRINTING OFFICE WASHINGTON: 1990 For sale by the Superintendent of Documents, Congressional Sales Office COMMITTEE ON SCIENCE, SPACE, AND TECHNOLOGY ROBERT A. ROE, New Jersey, Chairman GEORGE E. BROWN, JR., California DAVE MCCURDY, Oklahoma NORMAN Y. MINETA, California TIM VALENTINE, North Carolina ROBERT S. WALKER, Pennsylvania" CLAUDINE SCHNEIDER, Rhode Island DON RITTER, Pennsylvania SID MORRISON, Washington RON PACKARD, California ROBERT C. SMITH, New Hampshire HARRIS W. FAWELL, Illinois D. FRENCH SLAUGHTER, JR., Virginia LAMAR SMITH, Texas JACK BUECHNER, Missouri CONSTANCE A. MORELLA, Maryland CHRISTOPHER SHAYS, Connecticut DANA ROHRABACHER, California STEVEN H. SCHIFF, New Mexico TOM CAMPBELL, California |