1. ?Flow of Molten Polymers through Screens and Screen Packs,? Ph.D. Thesis, University of Colorado (1974); (available from Univ. Microfilms, Ann Arbor, MI),
2. ASTM Standard E 11-70, ?Annual Book of ASTM Standards,? Part 41, American Society for Testing and Materials Philadelphia, PA (1977).
3. (Ed.), ?Processing of Thermoplastic Materials,? p. 618, Reinhold Publishing Corp., New York (1959).