Memo from To: petantd- JOSHUA LEDERBERG DEC 221975 De oon inregenot Fr Ko mn meg ae ‘ Corres Tints vivweta., Don arny cnart wnt Dawe fs Leen be fo elt How, ! Puy Witte uartaceinur 7 aeyerede of DWK{RIN by Havoopten ancl, ba af Spread ape he ° Pk, gt peng by Proressor EDERBERG , Departmofiy of Genctics School of Medicine Stanford Vniversity Stanford, California 94305