TY  - BOOK
AU  - Knowles, Ian W. 
AU  - Lewis, Roger T. 
TI  - Spectral Theory of Differential Operators
SN  - 0444862773
U1  - 515.7222 KNO-LEW -55 
PY  - 1981///
CY  - Amsterdam
PB  - North-Holland Publishing Company
KW  - Differential Operators
ER  -