CONFERENCE
... Speakers Professor G. E. Blackman, M.A | University of Oxford. Dr. E. Holmes, M.Sc., F.RIC,, Plant Protection Limited. Dr. W. E. Ripper, Ph.D., F.RES., Pest Control Limited, S. J. Travers, Esq.,, M.8.E., ND.A., Provincial Crop Husbandry Adviser, N.AAS, N.AAS ...