3 Puppy StoriesKristina Callahan, Michael Hale, Eve Frederrick, Theodore Frederick · First published 2018Open the Tome
In Your HeadDimitra Papagrigoraki, Andriana Callahan, Kristina Perunicic, Anonymous Author · First published 2018Open the Tome
Vampire AttackAndre Duggan, Mark Green, Bryan Golden, Kristina Callahan · First published 2016Open the Tome
Condition of Vegetation Communities in Allegheny Portage Railroad National Historic Site and Johnstown Flood National MemorialStephanie Perles, Kristina Callahan, Matthew Marshall, National Park Service Staff · First published 2013Open the Tome
Grey Faction - Arrival of the Grey Queen (2nd Edition)Mark Green, Kristina Callahan · First published 2013Open the Tome
Integrity of Benthic Macroinvertebrate Communities in Allegheny Portage Railroad National Historic Site and Johnstown Flood National MemorialCaleb Tzilkowski, Kristina Callahan, Matthew Marshall, Andrew Weber, National Park Service Staff · First published 2013Open the Tome
Wadeable Stream Monitoring in Allegheny Portage Railroad National Historic Site, Delaware Water Gap National Recreation Area, Johnstown Flood National Memorial, and Upper Delaware Scenic and Recreational RiverCaleb Tzilkowski, Andrew Weber, Kristina Callahan, Matthew Marshall, National Park Service Staff · First published 2013Open the Tome
