Genre Forests and forestry / Pennsylvania / Periodicals / Forests and forestry / Societies, etc and 4 more . Names leaves / wood / soil / called / bark and 2629 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names american / par / paris / lea / la and 2171 more

Genre Insects / Periodicals . Names lepidoptera / type / insects / sp / american and 1676 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names la / par / life / horse / order and 6483 more