Jan-H. Raabe (y0001095@ws.rz.tu-bs.de) wrote:

: Icarus 32, 473-475 (1977)
:            The Absence of Extraterrestrials on Earth
:                   and the Prospects for CETI

:                    David W. Schwartzman
:            Department of Geology and Geography,
:                     Howard University,
:                   Washington D.C. 20059
:          Received March 24, 1977; revised May 16, 1977


By the way:
anybody familiar with astronomy and the concept of the Galactic
Habitable Zone will remember the Name of Cjarles Lineweaver from
Australia, who co-authored a paper on 'Thermobiology' with someone
named David Schwartzman (no W. ?) some years before.
(to be found on the Internet)

_This_ Schwartzman was from Howard, Wash., as well, but from the
Biology Department, not Geology.

I wonder if these are different persons, or members of the same family?

best regards
J.