Volume 1 by Shahid Akhtar Document No. IDRC/042e, 1975. Volume 2 by Francis M. Delaney, Document No. IDRC/069e, 1976. Volume 3 by Francis M. Delaney, Document No. IDRC/039e, 1977. International Development Research Centre, Ottawa, Canada. No price.
by Virginia R. Ivens, Daniel L. Mark, and Norman D. Levine. vi + 270 pages, illustrated. Special Publication 52, Colleges of Agriculture and Veterinary Medicine, University of Illinois at Urbana-Champaign. No price.
