TY  - BOOK
AU  - Encyclopaedia of Mathematical Sciences
AU  - Shubin, M. A.; ed.
TI  - Partial differential equations; No.7 - Spectral theory of differential operators
T2  - Encyclopaedia of Mathematical Sciences
U1  - 510.3 
PY  - 1994///
CY  - Berlin
PB  - Springer-Verlag
N1  - "Purchased under NBHM grant for the year 1994-1995"
ER  -