Upper Cretaceous ...
Maryland Geological Survey William Bullock Clark 1860-1917; Marcus I Goldman b. 1881 (Marcus Isaac); Edward Wilber Berry b. 1875; Julia Anna Gardner b. 1882; Henry Augustus Pilsbry b. 1862; Ray S Bassler b. 1878 (Ray Smith); Lloyd William Stephenson b. 1876
Baltimore The Johns Hopkins press 1916
Localização: IGC - Instituto de Geociências (551.770973 M393u v.2 )(Acessar)