John F. Hoffecker 2 books Science & Technology Books by John F. Hoffecker The human ecology of Beringia Dry Creek
/https://covers.openlibrary.org/a/id/6116100-L.jpg)
/https://covers.openlibrary.org/b/id/6116090-L.jpg)
/https://covers.openlibrary.org/b/id/8849714-L.jpg)