Cowlishaw, M. F. <br/><br/>
The REXX language  a practical approach to programming 
M. F. Cowlishaw 
 - Englewood Cliffs, N.J.  Prentice-Hall  1985 
 - 176 p. ; 23 cm. 
<br/><br/><label>ISBN: </label>013780735x 
<br/><br/><label>LCCN: </label>84-63133