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26by Kitching, James W., Collinson, James W., Elliot, David H., Colbert, Edwin H.Get access
Published in Science (1972)
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Article in Journal/Newspaper -
27by Elliot, David H., Colbert, Edwin H., Breed, William J., Jensen, James A., Powell, Jon S.Get access
Published in Science (1970)
Get access
Article in Journal/Newspaper