ID:DA01962886
Kovar, A. J.
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prepared by G.O.W. Kremp, H.T. Ames & A.J. Kovar
Pennsylvania State University 1959 Catalog of fossil spores and pollen / prepared by G. O. W. Kremp, H. T. Ames & Hilde Grebe vol. 7
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Pennsylvania State University 1958 Catalog of fossil spores and pollen / prepared by G. O. W. Kremp, H. T. Ames & Hilde Grebe vol. 4