TY  - BOOK
AU  - Gelfand, I.M.  .
TI  - Functions and graphs / 
SN  - 0-486-42564-9
U1  - B23:6 
PY  - 2002///
CY  - New York : 
PB  - Dover Publications, INC. , 
KW  - Graphic methods
ER  -