Harshberger John William

The Botanists Of Philadelphia And Their Work

Phytogeographic Survey Of North America: A Consideration Of The Phytogeography Of The North American Continent, Including Mexico, Central America And

The Vegetation Of The New Jersey Pine-Barrens: An Ecologic Investigation

The Vegetation Of The Yellowstone Hot Springs

Phytogeographic Survey Of North America

The Vegetation Of The New Jersey Pine-Barrens: An Ecologic Investigation