TY  - BOOK
AU  - Hetzel,Michael L.
AU  - Hetzel,Carol W.
TI  - Relay circuits for psychology
T2  - Century psychology series
SN  - 0390438103
U1  - 150.28 
PY  - 1969///]
CY  - New York
PB  - Appleton-Century-Crofts
KW  - Psychological apparatus
KW  - Electric relays
ER  -