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Ranking of Pennsylvania counties in agriculture 1964
(1964)
The population of Pennsylvania : a social profile
(1963)
Historical Sketch of the Finances of Pennsylvania
Worthington, T. K., (1887)
An Economic Model of Vertical Integration and Multiple Pricing Based on the Maple Sirup Industry
Taylor, Reed D., (1968)
The role of farm management in underdeveloped countries
Pasto, Jerome K., (1961)
Facts in a century of agriculture in Pennsylvania : 1839 to 1950
Chen, Kuan-I, (1955)