TY  - BOOK
AU  - Weckroth,Johan
TI  - Studies in Colour After-Images : : presentation of Basic Data and Previous Studies, with some new Observations and a Theorical Discussion
T2  - Annales Academiae Scientiarum Fennicae ; 
PY  - 1964///
CY  - Helsinki : 
PB  - Suomalainen Tiedeakatemia, 
ER  -