Dagys, A. S. (1962). Novie pozdnetriasovie Spiriferinacea severo-zapadnogo kavkaza [New Late Triassic Spiriferinacea from the northwestern Caucasus]. Paleontologicheskii Zhurnal. 1962: 47-56.
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Dagys, A. S.
1962
Novie pozdnetriasovie Spiriferinacea severo-zapadnogo kavkaza [New Late Triassic Spiriferinacea from the northwestern Caucasus]