TY  - BOOK
AU  - Conference on "Approximation of Eigenvalues of Differential Operators", Vanderbilt Univ., Nashville, June 26-30, 1972
AU  - Weinberger, Hans F.
TI  - Variational methods for eigenvalue approximations: ; lectures presented at the National Science Foundation, Conference Board of the Mathematical Sciences 
U1  - 515.64 
PY  - 1974///
CY  - Philadelphia
PB  - SIAM
ER  -