Prince, Ellen Friedman <br/><br/>
English aspectual constructions / 
Ellen Friedman Prince 
 - Pennsylvania :  University of Pennsylvania,  1974 
 - xviii, 212 p. ;  21 cm. 
<br/><br/>Thesis (Ph.D.)  - University of Pennsylvania, 1974 
<br/><br/>Bibliography : p. xiii-xviii 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Grammar, Generative