1. IPB Handbook;Pirie,1971
2. in ?Proceedings of the Fourth Annual Alfalfa Symposium,? held at the University of Wisconsin, Madison, 1974.
3. and in ?Fifth Annual Alfalfa Symposium,? held at Hershey, Pennsylvania, 1975.
4. IPB Handbook;Kohler,1971
5. and ?Mechanical parameters in leaf cell rupture for protein production,? paper No. 75-1057 presented at ASAE Summer Meeting at University of California, Davis, June 22-25, 1975.