Kincaid, C.K. : The high price of skateboarding. Quart. Bull ., Wisc. State Board of Health17: 9, 1965.
2.
Life Magazine, May 14, 1965, Cover and pp. 126-134. Skateboards—The craze, the menace.
3.
Liver, J.A. and Wiley, J.J.: Skurfing injuries. Canad. Med. Assn. J.93: 651, 1965.
4.
Pierson, W.R. and Montoye, H.J.: Movement time, reaction time, and age. J. Geront.13: 418, 1958.
5.
Slee, V.N., Perlman, J.M., Schuman, S.H. and Leighton, E.: The potential of P.A.S. for epidemiologic research, read before the Epidemiology Section of the A.P.H.A. in Chicago, October, 1965.
