1. Official Methods of Analysis,1984
2. A User’s Guide to SAS 76;Barr,1976
3. The effect of pelletizing on vitamins A and E;Bierer;J. Am. Vet. Med. Assoc.,1958
4. Tests show variable impact of processing on vitamin A;Jansen;Feedstuffs,1985
5. Trouble shooter’s guide for pelleting;Olentine;Feed Managern.,1983