COMPARISON OF TWO PROCEDURES FOR DETERMINATION OF CHOLINESTERASE IN LIVESTOCKCROOKSHANK HR; PALMER JS.1978; CLIN. TOXICOL.; USA; DA. 1978 PUBL. 1979; VOL. 13; NO 5; PP. 557-566; BIBL. 4 REF.Article

EFFECTS OF CHRONIC EXPOSURE TO 3% CO₂ ON ZINC METABOLISM = EFFETS DE L'EXPOSITION CHRONIQUE AU CO₂ A 3% SUR LE METABOLISME DU ZNGIANNETTA CL; CROOKSHANK HR.1974; AEROSPACE MED.; U.S.A.; DA. 1974; VOL. 45; NO 10; PP. 1155-1158; BIBL. 23REF.Article

CHRONIC EXPOSURE OF SHEEP TO SILVER IODIDE.YOUNGER RL; CROOKSHANK HR.1978; WAT. AIR SOIL POLLUT.; NETHERL.; DA. 1978; VOL. 9; NO 3; PP. 281-287; BIBL. 19 REF.Article

CHRONIC LEAD POISONING IN HORSES.DOLLAHITE JW; YOUNGER RL; CROOKSHANK HR et al.1978; AMER. J. VETER. RES.; USA; DA. 1978; VOL. 39; NO 6; PP. 961-964; BIBL. 8 REF.Article

EFFECTS OF 5 JUVENILE HORMONE ANALOGUES APPLIED TOPICALLY TO CATTLE NATURALLY INFESTED WITH HYPODERMA LARVAE (DIPTERA: OESTRIDAE) = EFFETS DE 5 ANALOGUES D'HORMONE JUVENILE APPLIQUES LOCALEMENT A DU BETAIL INFESTE NATURELLEMENT AVEC DES LARVES D'H. (D.: O.)YOUNGER RL; WRIGHT JE; SMALLEY HE et al.1975; J. MED. ENTOMOL.; HAWAII; DA. 1975; VOL. 12; NO 5; PP. 517-524; BIBL. 33REF.Serial Issue