Sims, P.A., Fryxell, G.A. & Baldauf, J.G. (1989). Critical examination of the diatom genus Azpeitia: Species useful as stratigraphic markers for the Oligocene and Miocene Epochs. Micropaleontology, 35(4): 293-307, pls. 1-3
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Sims, P.A., Fryxell, G.A. & Baldauf, J.G.
1989
Critical examination of the diatom genus Azpeitia: Species useful as stratigraphic markers for the Oligocene and Miocene Epochs.