Ockerman, Herbert W. <br/><br/>
Animal by-product processing & utilization  
 Animal by-product processing and utilization 
/H.W. Ockerman, C.L. Hansen. 
 - 1st ed. 
 - Lancaster, PA :  Technomic Pub. Co., Inc.,  c2000. 
 - xvi, 523 p. :  ill. ;  23 cm.