by Ostrander, Stephen.
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Appalachian winter
A Sierra Club naturalist's guide to the North Woods of Michigan, Wisconsin, and Minnesota
A clearing in the wilderness
The long-shadowed forest
Nearer nature
Yosemite : the embattled wilderness
A country year : living the questions [LP]
The wild marsh : four seasons at home in Montana
Scratching the woodchuck : nature on an Amish farm
The Okefenokee Swamp
The forest unseen : a year's watch in nature
Mount St. Helens : the eruption and recovery of a volcano
Parrotfish and sunken ships : exploring a tropical reef
The Outer Beach : a thousand-mile walk on Cape Cod's Atlantic shore
The outermost house :a year of life on the great beach of Cape Cod
Pennsylvania overlooks : a guide for sightseers and outdoor people
One day in the woods
Mount St. Helens National Volcanic Monument : a true book
A river's gifts : the mighty Elwha River reborn
Pennsylvania State Parks : a complete outdoor recreation guide for campers, boaters, anglers, hikers and outdoor lovers
Pennsylvania mountain landmarks. Volume 2
Pennsylvania mountain landmarks. Volume 3
Pennsylvania mountain landmarks. Volume 1
Wild Pennsylvania : a celebration of our state's natural beauty
Wild Britain :a traveller's guide
Landscapes of Central Pennsylvania
The heartbeat of the wild : dispatches from landscapes of wonder, peril, and hope
Out on the prairie
Welcome to the river of grass
Swampwalker's journal : a wetlands year
A North American rain forest scrapbook
Penn's Woods West
Thornapples
Road biking Western Pennsylvania
Escape to the mountain : a family's adventures in the wilderness
Rambling through Penn's Woods : selections from The Pennsylvania Naturalist
The history of Bucks County, Pennsylvania, from the discovery of the Delaware to the present time
History of Delaware County, Pennsylvania, from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science
Costa Rica : an ecotraveller's guide
Pennsylvania disasters : true stories of tragedy and survival
English
1st ed.
Natural history > Pennsylvania > Guidebooks.
Pennsylvania > Guidebooks.