Before speech :  the beginning of interpersonal communication / 
edited by Margaret Bullowa 
 - Cambridge :  Cambridge University Press,  1979 
 - 400 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0521220319 
<br/><br/><label>LCCN: </label>78-51671 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Interpersonal communication<br/>Nonverbal communication<br/>Parent and child<br/>Infant psychology