SCIENCE 552,922 Science policy implications of DNA recombinant molecule research : hearings before the Subcommittee on Science, Research and Technology U.S. House of Representatives Ninety-fifth Congress, First Session : March 29,30,31 ; April 27,28 ; May 3,4,5,25,26 ; September 7 and 8, 1977. - Washington : U.S. Government Printing Office, 1977. - 1291 s. ; il. ; 23 cm