TY - RPRT TI - Spatial frequency channels in human vision and the threshold for adaptation. AU - S Stecher AU - C Sigel AU - R V Lange PY - 1973 DO - 10.1016/0042-6989(73)90088-6 UR - https://pubmed.ncbi.nlm.nih.gov/4733211/ ID - 4733211 ER -