Melsen, Andrew Gerardus Maria van, 1812-  Melsen, Andrew Gerardus Maria van, 1812- <br/><br/>
The philosopy of nature. 

 - 3rd ed. 
 - Pittsburgh :  Duquesne University Press,  1961. 
 - Duquesne studies. Philosophical series ;  Duquesne studies. Philosophical series ;  2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy of nature.