1. and , Fogarty International Center Proceedings No. 28, Washington D. C., U. S. Government Printing Office, in press.
2. in and (Eds.) Contemporary Topics in Immunobiology, Plenum Press, New York 1973. 2: 189.
3. and , in (Ed.) The Biological Activity of Thymic Hormones, Kooyker Scientific Publications, Rotterdam 1975, p. 235.