Report of the Working Party on Co-operation and Communication between agencies concerned with children and young persons appearing before juvenile courts in Wales, 1977 = Adroddiad y Pwyllgor Gwaith ar Gydweithrediad a Chyfathrebiad cyd-rhwng y gwasanaethau sydd yn ymwneud a Phlant a Phersonau Ifanc a ymddengys o flaen Llysoedd lenctid yng Nghymru, 1977 - Davie, Ronald (Childrens Regional Planning Committee for Wales, 1977)