Fourteenth international congress on irrigation and drainage : Rio de Janeiro, Brazil, 1990; transactions; 40th year = Quatorzième congrès international des irrigations et du drainage; Rio de Janeiro, Brésil, 1990; actes; 40ème annèe ; Vol. 1-D

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1990

Fourteenth international congress on irrigation and drainage : Rio de Janeiro, Brazil, 1990; transactions; 40th year = Quatorzième congrès international des irrigations et du drainage; Rio de Janeiro, Brésil, 1990; actes; 40ème annèe ; Vol. 1-A

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1990

Fourteenth international congress on irrigation and drainage : Rio de Janeiro, Brazil, 1990; transactions; 40th year = Quatorzième congrès international des irrigations et du drainage; Rio de Janeiro, Brésil, 1990; actes; 40ème annèe ; Vol. 1-B

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1990

Fourteenth international congress on irrigation and drainage : Rio de Janeiro, Brazil, 1990; transactions; 40th year = Quatorzième congrès international des irrigations et du drainage; Rio de Janeiro, Brésil, 1990; actes; 40ème annèe ; Vol. 1-C

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1990

Fourteenth international congress on irrigation and drainage : Rio de Janeiro, Brazil, 1990; transactions; 40th year = Quatorzième congrès international des irrigations et du drainage; Rio de Janeiro, Brésil, 1990; actes; 40ème annèe ; Vol. 1-E

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1990