Lewis, P D <br/><br/>
Responses of immature pullets to repeated cycles of gradual increases and abrupt decreases in photoperiod.  [electronic resource] 

 -  British poultry science  Dec 1997 
 - 611-3 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0007-1668 
<br/><br/><label>Standard No.: </label>10.1080/00071669708418045  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Body Weight<br/>Chickens--growth & development<br/>Darkness<br/>Eggs<br/>Female<br/>Light<br/>Lighting<br/>Oviposition--physiology<br/>Sexual Maturation<br/>Time Factors