Bibliographical noteFunding Information:
Support was provided by grants from the American Cancer Society (E-277 and E-278B ) and U.S. Atomic Energy Commission Contract No. AT(3o-I)-2643. The author is indebted to Drs. FELIX HARDER and LouIs SHUSTER for advice, and to Miss LYNN" R. COZZA and Miss MARY ELLEN MURPHY for expert technical assistance. This is publication No. i288 of the Cancer Commission of Harvard University.