November 11, 1976 Dear Dr. Mathews: The Environmental Defense Fund and the Natural Resources Defense Council hereby submit to you a petition concerning the regulation of recombinant DNA research and technology. We would very much appreciate your giving this matter prompt attention. Enclosed also are copies of letters from Dr. Robert L. Sinsheimer of the California Institute of Technology and Mr. Alan McGowan, President, Scientists' Institute for Public Information. Sincerely yours, Burke K. Zimmerman, Ph.D.