Problems of the Arid Zone : proceedings of the Paris symposium
Unesco
Problems of the Arid Zone : proceedings of the Paris symposium - Paris The Author c1962 - xii,481p.:ill.; 28cm.- - Arid Zone research; no.18 .
333.73061 / UNE
Problems of the Arid Zone : proceedings of the Paris symposium - Paris The Author c1962 - xii,481p.:ill.; 28cm.- - Arid Zone research; no.18 .
333.73061 / UNE