TY  - BOOK
AU  - Elmore,William C.(William Cronk).
AU  - Heald,Mark A.
TI  - Physics of waves
SN  - 07-019260-X
AV  - QC157 E55
PY  - 1969///
CY  - New York, E.U.A.
PB  - McGraw-Hill
ER  -