TY  - RPRT
TI  - Letter Circular 525: color harmony: an annotated bibliography (superseding Letter Circular 356)
PY  - 1938
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 525
DO  - 10.6028/NBS.LCIRC.525
ER  -