New Zealand Journal of Agriculture
15 February 1950
New Zealand Journal of Agriculture
15 July 1953
New Zealand Journal of Agriculture
15 December 1953
New Zealand Journal of Agriculture
15 January 1957
New Zealand Journal of Agriculture
15 March 1957
New Zealand Journal of Agriculture
15 August 1957
New Zealand Journal of Agriculture
15 August 1957
New Zealand Journal of Agriculture
15 March 1954