Annual report /

Eitemau Tebyg

• Report on the Fifth Congress of the International Commission on Irrigation and Drainage, Tokyo, 1963 /
  gan: East, L. R. (Lewis Ronald), 1899-1994
  Cyhoeddwyd: (1963)
• Report on the Fourth Congress of the International Commission on Irrigation and Drainage, Madrid, 1960 /
  gan: East, L. R. (Lewis Ronald), 1899-1994
  Cyhoeddwyd: (1960)
• Report on Third Congress of the International Commission on Irrigation and Drainage held in California ... May 1-18, 1957 /
  gan: Oram, J. A. F.
  Cyhoeddwyd: (1957)
• Seventh congress on irrigation and drainage : transactions.
  Cyhoeddwyd: (1969)
• Irrigation in the world : comparative developments /
  gan: Fukuda, Hitoshi, 1906-
  Cyhoeddwyd: (1976)