Decker, C. E. (1935). The Graptolites of the Simpson Group of Oklahoma.
Chicago Style CitationDecker, Charles E. The Graptolites of the Simpson Group of Oklahoma. 1935.
Cita MLADecker, Charles E. The Graptolites of the Simpson Group of Oklahoma. 1935.
Atenció: Aquestes cites poden no estar 100% correctes.