Systems modelling / 
prepared for the course team by Bernard Tate and Lyn Jones. 
 - Milton Keynes :  The Open University Press,  1975. 
 - v. :  ill. ;  30 cm. 
<br/><br/><label>ISBN: </label>0335060501  unit 1-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory.