1. ?Rotational Casting of Thermoplastics,? Society of Plastics Engineers Educational Seminar, New York, N.Y. (May 1970).
2. USI Chemicals Symposium on Rotational Molding, Chicago, Ill. (Nov. 1963).
3. USI Chemicals Symposium II on Rotational Molding, (a) R. E. Duncan, ?Technical Considerations in Rotational Molding with Linear Powdered Polyethylene;? (b) A. B. Zimmerman, ?Powdered Polyethylene and the Rotational Molding Process.?
4. ?Modern Plastics Encyclopedia,? Vol. 47, No. 10A, McGraw-Hill, Inc., New York, N. Y. (1970).
5. USI Chemicals, ?Rotational Molding of Microthene Polyethylene Powder,? Bullettin PL 23-468.