[Washington, D.C.] : Congressional Research Service, Library of Congress, 1987
Physical Details
vi, 43 pages : illustrations ; 28 cm
OCLC
ocm16394613
Cover title.
"July 23, 1987."
"Prepared at the request of the House Science, Space and Technology Committee, Subcommittee on Science, Research and Technology for use in hearings ...."--P. [iii].