Coupe-O'Kane, Judith. 
Communication before speech :  development and assessment /  Judith Coupe O'Kane and Juliet Goldbart ; with chapter 8 written by Jane Jolliffe, Barbara Rossington and Ruth Miller ; and with acknowledgement to the following contributors to the first edition Mark Barber ... [et al.].   - 2nd ed.   - London :  David Fulton,  1998.   - 160p. :  ill., forms ;  30cm.