TY  - BOOK
AU  - 
AU  - Carlsen,Ruth Christoffer
TI  - Perception
SN  - 0070099081 (hardback)
AV  - BF311 C37 1975 
PY  - 1975///
CY  - United State of America
PB  - McGraw-Hill
KW  - Perception
ER  -