April 16, 1952 Dr, M. Demereo Department of Genetics Carnegle Institution Cold Spring Harbor, L.I., N.Y. Dear Dr. Demerec: We have in hand several manuscripts and papers in press which refer to papers in the 1951 Symposium volume. I wonder if it would be possible t© obtain the correct page numbers for these papers, so that proper reference can be made now. For your convenience, I abedose a checklist and return envelope. If the titles have been altered from the specification on the program, I would be obliged for the correction. May I raise a trivial question? The citations to CSH symposia are almost the bulkiest I know, owing to the long title, but their frequency is only a testimony of their value, It would be a minor convenience if the symposium iteelf could suggest a concise, suggestive abbrefiation for use in bibliographies. With best regards, Sincerely, Joshua Lederberg a