515
 Bell 
I 
Bellmas, Richard   Ernest,  1920 
An   introduction   to   invariant  imbeddeng   [by]  R. Bellmas [and]   G. M. Wing.        New York   ,   J. Wiley   [c1975]
xv, 250  p.  ilus  . 24 cm .  (Pure   and   applied   mathematiocs)

''A Wiley -   Interascioce   publication 
 Bibliografi al piie de los   capitulos