TY  - BOOK
AU  - Kennard, Richtmyer.
AU  - Kennard, E.H.
AU  - Lauritsen, T.
TI  - Introduction to modern physics
U1  - 503 RIC 
PY  - 1955///
CY  - New York
PB  - McGraw-Hill Book Company INC
KW  - Physics
N1  - Includes index
ER  -