Charles B. Greenberg, Ph.D.,
is the author of the following articles:
Pittsburgh As Frontier Gateway in 1803 and Staging Point for
The Lewis & Clark Expedition (1-4), Main Event, Keelboat,
Corps, Latitude & Longitude, Medicine, Scientific Enterprise,
© 2002 Charles B. Greenberg, Ph.D. All rights reserved.
Mark Evans Ph.D.,
is the author of the Pittsburgh
© 2002 Mark Evans,
Ph.D. All rights reserved.
Smithsonian Flora Preservation: http://www.si.edu/copyright/.
Huelsman created the Pittsburgh