1951. 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. 28, 2 (Dec. 1951).