TY  - CHAP
A1  - Clarke, J. M.
A1  - Swartz, C. K.
C1  - In: Maryland Geological Survey. Middle and Upper Devonian. The Johns Hopkins Press, Baltimore, pp. 535-702
TI  - Systematic paleontology of the Upper Devonian deposits of Maryland
UR  - https://msa.maryland.gov/megafile/msa/speccol/sc6000/sc6046/000000/000001/000000/000034/pdf/msa_sc6046_1_34.pdf
PY  - 1913
Y2  - 2026-06-13
ER  -