Ephraim Zimmerman

2 books • 1 series

Aug 28, 2013
Cover of Vegetation Classification and Mapping at Allegheny Portage Railroad National Historic Site

Vegetation Classification and Mapping at Allegheny Portage Railroad National Historic Site

Aug 28, 2013
Cover of Distribution and Abundance of Nonnative Plant Species at Johnstown Flood National Memorial and Allegheny Portage Railroad National Historic Site

Distribution and Abundance of Nonnative Plant Species at Johnstown Flood National Memorial and Allegheny Portage Railroad National Historic Site (Technical Report Nps/Ner/Nrtr?2007/083)