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)
Soil survey of Lancaster County, Pennsylvania
Anonymous (not verified)
Serpentine Barrens Restoration and Management Plan: Jerrehian Estate—Fern Hill Eastern Serpentine Barren, West Goshen Township, Chester County, Pennsylvania
Anonymous (not verified)
Fire histories for Goat Hill, Nottingham and Chrome barrens
Anonymous (not verified)
Site survey summary — Big Pines serpentine barren, Maryland
Anonymous (not verified)
Natural heritage plant survey for the lower Greenbriar Branch-Travilah serpentinite area
Anonymous (not verified)
Soil Survey of Cecil County, Maryland
Anonymous (not verified)