Self-administration of abused substances :  methods for study / 
edited by Norman A. Krasnegor. 
 - Springfield :  National Technical Information Service,  1978. 
 - ix, 246 p. :  ill. ;  28 cm. 
 - National Institute on Drug Abuse Research no. 20 Monograph series .
<br/><br/>Includes references. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drug abuse--self-administration--Congresses.<br/>Substance abuse-self-administration--Congresses.