804,978 1.RECOMBINANT Recombinant DNA research / prep. by the Office of the Director, NIH. - [Washington] i U.S. Department of Health, Education, and Welfare, Public Health Service National Institutes of Health. - 2 vol. ; 27 cm Vol. 1 : Documents relating to " NIH guidelines for research involving recombinant DNA molecules" February 1975 -June 1976. - August 1976. - X, 592 s.