1. DOVER CHEMICAL CORPORATION, Bulletin 544, 545 (1972a).
2. DOVER CHEMICAL CORPORATION, Bulletin 529, (1972b).
3. DOVER CHEMICAL CORPORATION, Bulletin 530, (1972c).
4. HOOKER CHEMICAL CORPORATION, Technical Bulletin (1946).
5. KING, J.O.L., Vet. Rec.92, 546 (1973).