TY  - BOOK
AU  - Helms L L
TI  - Introduction to the potential theory
T2  - Pure and applied mathematics: A series of texts and monographs; 12
U1  - B83, L5 
PY  - 1975///
CY  - New York    
PB  -  Robert E Krieger      
KW  - Potential theory
N1  - Bibliography 275-278p
ER  -