TY  - BOOK
AU  - Sagan,Hans
TI  - Boundary and eigenvalue, problems in mathematical physics
AV  - QA401.S24 
PY  - 1961///
CY  - New York
PB  - John Wiley and Sons
KW  - Mathematical physics
KW  - Boundary value problems
N1  - Includes bibliographical references
ER  -