Edward J. Tarbuck
Alexander von Humboldt
Richard Henry Dana
Harm J. de Blij
Robin Wall Kimmerer
Siri Carpenter
Clare A. Gunn
International Congress on the History of Sciences (20th 1997 Liège, Belgium)
Simon Winchester
James S. Monroe
Richard J. Chorley
Alan F. Arbogast
David A. Fennell
Roger Graham Barry
Sallie A. Marston
S. J. Hawkins
Lydia M. Pulsipher
R. B. Bunnett
Taylor, Peter J.
Ian Whittaker