TY  - GEN
AU  - Hay,John
TI  - Upper Rio Grande: embattled river
T2  - Publication, 74
KW  - Zone aride
KW  - Fleuve
KW  - Eau
KW  - Etats Unis
KW  - Ouest
N1  - <Donation Engel>; bibliogr. p. 498
ER  -