جستوجوی «پنسیلوانیا»
اقتصاد
Sketches in Crude-oil
تاریخ معاصر
Daily Stories of Pennsylvania
تاریخ معاصر
The Old Pike: A History of the National Road
تاریخ معاصر
Early Quaker Education in Pennsylvania
تاریخ معاصر
"Pennsylvania Dutch," and Other Essays
زیستشناسی
Common Trees of Pennsylvania
تاریخ معاصر