TY  - BOOK
AU  - Dickson, B.T., ed.
ED  - UNESCO
TI  - Guide book to research data for arid zone development
T2  - Arid zone research
U1  - 551.5943 
PY  - 1957///
CY  - Paris
PB  - UNESCO
KW  - Regiones áridas
KW  - Investigación
ER  -