July 18, 1951.

Dear Dr. Demerec:

Klieneberger's review article on filterable forms of bacteria has appeared
in print. Please complete the reference, if tine permits, as follows:

Klieneberger-Hobel, b., 1951, Filterable forms of bacteria.

Bact. Rev. 15: 77-103., in place of the incompls te reference now in ny
symposium ms. Thank you.

Joshua Lederberg