Allen, D M <br/><br/>
A device providing gradual transitions between light and dark periods in the animal room.  [electronic resource] 

 -  Laboratory animal science  Apr 1980 
 - 252-4 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0023-6764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Animals, Laboratory<br/>Darkness<br/>Housing, Animal<br/>Light<br/>Lighting