ISBN 9781492804505 books & textbook
Statistical Analysis of Understory Vegetation Data from Valley Forge National Historical Park, Pennsylvania, 1993 - 2003 (Technical Report NPS/NER/NRTR?2008/118)
Diefenbach, Duane R. R. Vreeland, Wendy C. Heister, Kristina M. National Park Service
CreateSpace Independent Publishing Platform /2013-09-27 Paperback / 60 Pages
isbn-10: 1492804509 / isbn-13: 9781492804505
