Exchangeable calcium and magnesium levels in Allegheny mound-ant (Formica exsectoides F., Hymenoptera: Formicidae) anthills on Pink Hill, a serpentine barrens in Tyler Arboretum, Delaware County, Pennsylvania
Anonymous (not verified)
Willisbrook Barrens site fire management plan
Anonymous (not verified)
Serpentine barrens in Chester County, Pennsylvania
Anonymous (not verified)
Soils and vegetation of the Unionville Serpentine outcrop
Anonymous (not verified)
Management Plan for Goat Hill Wild Plant Sanctuary
Anonymous (not verified)
National Natural Landmarks evaluation report: Unionville Serpentine Barrens
Anonymous (not verified)
Flora Cestrica: an Attempt to Enumerate and Describe the Flowering and Filicoid Plants of Chester County ... Pennsylvania ...
Anonymous (not verified)
Florula Cestrica: an Essay Towards a Catalogue of the Phaenogamous Plants, Native and Naturalized, Growing in the Vicinity of the Borough of West-Chester, in Chester County, Pennsylvania ...
Anonymous (not verified)
Traces on the Appalachians: a Natural History of Serpentine in Eastern North America
Anonymous (not verified)