Vol. s4-23, Issue 135, 1907March 01, 1907 EDT
Clay of Probable Cretaceous Age at Boston, Massachusetts
Clay of Probable Cretaceous Age at Boston, Massachusetts
Frederick G. Clapp,
Clapp, F. G. (1907). Clay of Probable Cretaceous Age at Boston, Massachusetts. American Journal of Science, s4-23(135), 183–186. https://doi.org/10.2475/ajs.s4-23.135.183