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Hawkes, R.L. and Chiang, C.N. (1986) Urine testing for drugs of abuse, National Institute of Drug Abuse, Rockville. Henriksson, L.E. (1991) "The unconvincing case for drug testing", Canadian Public Policy, 17(2), 183-196. Hingson, R. et al. (1985) "Emmployee drinking patterns and accidental injury: A study of four New England states", Journal for Studies on Alcohol, 46(4), 298-303. Hovius, B ... ................
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