Peeke, H V <br/><br/>
Forward conditioning, backward conditioning, and pseudoconditioning sensitization in the earthworm (Lumbricus terrestris).  [electronic resource] 

 -  Journal of comparative and physiological psychology  Dec 1967 
 - 534-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0021-9940 
<br/><br/><label>Standard No.: </label>10.1037/h0025213  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Annelida<br/>Conditioning, Classical<br/>Conditioning, Psychological<br/>Extinction, Psychological