@misc{indiciaee651af6d8472, title = {Visual contrast sensitivity functions obtained with colored and achromatic gratings.}, author = {M A Nelson and R L Halberg}, year = {1979}, doi = {10.1177/001872087902100210}, url = {https://pubmed.ncbi.nlm.nih.gov/489022/}, note = {Source identifier: 489022} }