Bretz, Philip E. <br/><br/>
The fatique crack propagation behavior of semi-crystalline polymers  [microform] / 
Philip E. Bretz 
 - Ann Arbor, Mich. :  University Microfilms International ,  1980 
 - 3 microfiches ;  11 x 15 cm. 
<br/><br/>Thesis (Ph.D.)-Lehigh University, 1980 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crystalline polymers<br/>Polymers