Note 79 — J. E. MARR, M.A., F.R.S. (continued 3)
Reading edition
Walcott, C. D., "Preliminary Notes on the Discovery of a Vertebrate Fauna in Silurian (Ordovician) Strata," Bulletin Geol. Soc. America, vol. III. p. 153.
Reading edition
Walcott, C. D., "Preliminary Notes on the Discovery of a Vertebrate Fauna in Silurian (Ordovician) Strata," Bulletin Geol. Soc. America, vol. III. p. 153.