Communications flows :  a census in the United States and Japan/ 
Ithiel de Sola Pool ... [et al.] 
 - Tokyo :  University of Tokyo Press,  1984 
 - 196 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>4130660888 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication--United States<br/>Communication--Japan