Bulletin
Commonwealth Bureau of Pastures and Field Crops, Hurley, England (Berkshire)
The influence of the drought of 1921. Welsh Plant Breeding Station. Bull. Ser. H. No. 1. pp. 12-15. Aberystwyth, 1922. : , Jenkin, Thomas James, and Williams, Rhys David. Problems connected with the fertilization of the grasses and clovers.