“BOOK REVIEW By J.H.W. - REPORT OF THE STANDING SUB-COMMITTEE OF THE CONSULTATIVE COMMITTEE ON INSECTICIDE MATERIALS OF VEGETABLE ORIGIN ON METHODS OF ANALYSIS OF VEGETABLE LNSECTICIDES ON THE WORLD-WIDE COLLABORATIVE ANALYSIS OF PYRETHRUM FLOWERS 1948-1949”. Tropical Agriculture, vol. 28, no. 2, Dec. 1951, https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/5026.