TY  - BOOK
AU  - Ekman,Paul
AU  - Friesen,Wallace V.
TI  - Unmasking the face: a guide to recognizing emotions from facial clues 
SN  - 013938183X
PY  - 1975///
CY  - Englewood Cliffs, N. J.
PB  - Prentice-Hall
KW  - Facial expression
ER  -