Froman, N & Froman, P.O <br/><br/>
Phase-integral method  allowing nearlying transition points 
N. Froman & P.O. Froman 
 - New York  Springer  1996 
 - x  250 
 - Springer tracts in natural philosophy 40 .
<br/><br/><label>ISBN: </label>9780387945200 
<br/><br/><label>Dewey Class. No.: </label>13.04+13.07+4.04  / FROM