Blalock, Hubert M. <br/><br/>
Causal inferences in non experimental research 

 - Chapel Hill  University of North Carolina Press  1961 
 - 200p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inference<br/>Inference (Logic)<br/>Social sciences - Research<br/>Social sciences - Statistical methods
<br/><br/><label>Dewey Class. No.: </label>300.72 BLA-;