Butters, Ronald R.  1940- <br/><br/>
Linguistic deviance and linguistic competence  [microform] / 
by Roland R. Butters 
 - Ann Arbor, Mich. :  University Microfilms International,  1968 
 - 1 microfilm reel.:  positive. ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Iowa, 1967 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Spoken English<br/>English language--Variation