A geographic variation gradient in frogs, by Karl P. Schmidt.

v.20:no.29(1938)

Directory of environmental life scientists / prepared by the Institute of Ecology (TIE) for the U.S. Army Corps of Engineers.

v.7: North Atlantic Region

Stellwagen Bank National Marine Sanctuary final environmental impact statement/management plan / Sanctuaries and Reserves Division.

1

Stellwagen Bank National Marine Sanctuary final environmental impact statement/management plan / Sanctuaries and Reserves Division.

2