1. This publication serves as a reference on the principles and procedures used to obtain hybrid seed of self and cross-pollination crop plants. For many crops, descriptions of these procedures are passed orally from experienced to inexperienced persons and are not available in the literature. This...
  2. 01 មករា 1958 A traveller's guide to some of the common trees, shrubs, vines and crop plants. 77 pgs, illustrations