Adolf, Leonard Allen, 1927-

The Operation of the English navigation system in colonial Pennsylvania 1681-1750 a case study / [microform] : by Leonard Allen Adolf. - Ann Arbor, Mich. : University Microfilms International, 1953. - 1 microfilm reel : positive ; 35 mm.

Thesis (Ph.D.) - University of Washington, 1953.


Merchant marine--History--17th century.--United Kingdom
Merchant marine--History--18th century.--United Kingdom
Merchant marine--History--17th century.--United States
Merchant marine--History--18th century.--United States