The lower Cretaceous Gryphæas of the Texas region,
Hill, Robert Thomas, 1858-1941.
The lower Cretaceous Gryphæas of the Texas region, by Robert Thomas Hill and Thomas Wayland Vaughan. - Washington, Govt. Print. Off., 1898. - 139, ix p. xxxv pl., diagrs. 24 cm.
gs 05000712
Gryphæa.
Paleontology--Texas.
Paleontology--Cretaceous.
QE75 / .B9 no. 151
The lower Cretaceous Gryphæas of the Texas region, by Robert Thomas Hill and Thomas Wayland Vaughan. - Washington, Govt. Print. Off., 1898. - 139, ix p. xxxv pl., diagrs. 24 cm.
gs 05000712
Gryphæa.
Paleontology--Texas.
Paleontology--Cretaceous.
QE75 / .B9 no. 151