7 books
The Leardo Map of the World, 1452 or 1453
The Geographical Lore of the Time of the Crusades
The Geographical Lore of the Time of the Crusades; A Study in the History of Medieval Science and Tradition in Western Europe - Primary Source Edition
The Geographical Lore of the Time of the Crusades; A Study in the History of Medieval Science and Tradition in Western Europe
Atlas of the Historical Geography of the United States
Aids to Geographical Research
Human Nature in Geography