1. Rivers of the world : a social, geographical, and environmental sourcebook Author/Creator: Penn, James R. Publication/Creation: Santa Barbara, Calif. : ABC-CLIO, [2001] Resource Type: Book Access & Availability: Loading
2. Encyclopedia of geographical features in world history : Europe and the Americas Author/Creator: Penn, James R. Publication/Creation: Santa Barbara : ABC-CLIO, [1997] Resource Type: Book Access & Availability: Loading