A Wittgenstein workbook / 
by Christopher Coope ...[et al.] 
 - Oxford :  Basil Blackwell,  1970 [reprinted 1971] 
 - 51 p. : 
<br/><br/><label>ISBN: </label>0631135502 
<br/><br/><label>Dewey Class. No.: </label>192  / Wi