Clarke KS: A survey of sports-related spinal cord injuries in schools and colleges, 1973-75 . J Safety Res9: 140-146 1977; personal communication
4.
Hay JG: Survey of trampoline injuries statistics, a report prepared for the Nissen Corp, June 1974
5.
Jackson RR: Personal communication
6.
Piper RA: Results of questionnaire survey of injuries in gymnastics. 1960-61 Season
7.
Stolov WD: Personal communication
8.
Ellis W., Green D., Holzalpfel N., et al: The trampoline and serious neurologic injuries. JAMA13: 79-82, 1960
9.
Kravitz H.: Personal communication
10.
Amyx RD: Personal communication
11.
ASTM Committee F8 on Protective Equipment for Sports: Standard consumer safety specification for components. Assembly and use of a trampoline. In Annual Book of ASTM Standards . Philadelphia, American Society for Testing and Materials, 1974, pp 1-4
12.
Harris R.: The Trampoline for Physical Education, Cedar Rapids, Iowa , 1977
13.
Lorde KM: Liability of Schools for Injuries to Students. Edited by JF Kennedy. Trial Lawyers Guide. Chicago, Callaghan and Co, 1973
14.
Piscopo J.: Clues to safety on the trampoline: supervision yes, somersaults no. J Health Phys Educ Rec37: 51-61, 1966