Callahan, Kristina K. books & textbook
Integrity of Benthic Macroinvertebrate Communities in Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial: Eastern ... Resource Data Series NPS/ERMN/NRDS?2010/025)
Tzilkowski, Caleb J. Callahan, Kristina K. Marshall, Matthew R. Weber, Andrew S. National Park Service
CreateSpace Independent Publishing Platform /2013-08-28 Paperback / 26 Pages
isbn-10: 1492168939 / isbn-13: 9781492168935
Condition of Vegetation Communities in Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial: Eastern Rivers and ... Resource Data Series NPS/ERMN/NRDS?2010/038)
Perles, Stephanie J. Callahan, Kristina K. Marshall, Matthew R. National Park Service
CreateSpace Independent Publishing Platform /2013-08-28 Paperback / 36 Pages
isbn-10: 1492167436 / isbn-13: 9781492167433
Wadeable Stream Monitoring in Allegheny Portage Railroad National Historic Site, Delaware Water Gap National Recreation Area, Johnstown Flood National ... Resource Data Series NPS/ERMN/NRDS?2011/212)
Tzilkowski, Caleb J. Weber, Andrew S. Callahan, Kristina K. Marshall, Matthew R. National Park Service
CreateSpace Independent Publishing Platform /2013-08-28 Paperback / 46 Pages
isbn-10: 1492166758 / isbn-13: 9781492166757
