1
Έκδοση 1956
“...United States. Department of the Interior. Bureau of Reclamation...”
Βιβλίο
2
Έκδοση 1960
“...United States. Department of the Interior. Bureau of Reclamation...”
Βιβλίο
3
Έκδοση 1960
“...United States Department of the Interior. Bureau of Reclamation...”
Βιβλίο