References by Author or Types

R. C. Walter , P. C. Manega , R. L. Hay , R. E. Drake , and G. H. Curtis
Laser-fusion 40Ar/39Ar dating of Bed I, Olduvai Gorge, Tanzania
Nature, 354, 145-149, 1991

M. D. Leakey , R. L. Hay , G. H. Curtis , R. E. Drake , M. K. Jackes , and T. D. White
Fossil hominids from the Laetolil Beds
Nature, 262(5568), 460-466, 1976
https://doi.org/10.1038/262460a0

G. H. Curtis and T. Cerling
Age of KBS Tuff in Koobi Fora Formation, East Rudolf, Kenya
Nature, 258(5534), 395-398, 1975
http://www.nature.com/nature/journal/v258/n5534/abs/258395a0.html