BIOLOGICAL ABSTRACTS UNIVERSITY OF PENNSYLVANIA PHILADELPHIA 4, PA, January 2th, 1950. Dr. Joshua Leduberg Department of Genetics University of Wisconsin Madison 6, Wisconsin. Dear Doctor Leduberg: Is the AMERICAN JOURNAL OF HUMAN GENETICS, and ZEITSCHRIFT FUR INDUKTIVE ABSTAMMUNGS-UND VERER= BUNGSLEHRE available to you, and if so, would you be interested in abstracting them? Sincerely, SAALM G. W. Walls.