Asher, Herbert B <br/><br/>
Causal modelling 

 - London  Sage publishers, inc.  1976 
 - 80 p.; 18cm. 
<br/><br/><label>ISBN: </label>803906544 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Causality<br/>Causation<br/>Simon and Blalock