TY  - BOOK
T1  - Unmasking the face a guide to recognizing emotions from facial clues
A1  - Ekman, Paul
A2  - Friesen, Wallace V.
LA  - English
PP  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
YR  - 1975
UL  - https://tuklas.up.edu.ph/Record/UP-99796217606184357
OP  - 212
CN  - BF 592 F33 E46
SN  - 013938183X
KW  - Facial expression.
ER  -