RT Book T1 On call: the work of a telephone helpline for child abusers A1 Colman, Warren LA Undetermined PP Aberdeen PB Aberdeen Univ. Pr. YR 1989 ED 1. publ. UL https://krimdok.uni-tuebingen.de/Record/1650763131 SN 0080379583 K1 Great Britain. Children. Abuse by parents. Prevention. Role of telephone services