Robert J. Shoemaker

American doctor and researcher

American photographer and researcher

Geologist

California state geologist and chief mineralogist

American medical researcher

American paleontologist and malacologist

Researcher

California state geologist and chief mineralogist

American geologist

American surgeon and cerebral palsy researcher

US Forest Service researcher

Polish anthropologist and ethnographer based in England and the USA

American medical researcher

American biologist and author

Notable American horticulturalist and plant researcher

Botanist

American paleontologist

U.S. geochemist at the Geophysical Laboratory, Washington, U.S.A.

American public health administrator