TY - RPRT TI - Letter Circular 837: painting interior walls and trim (superseding Letter Circular 304) AU - Hickson, EF AU - Howard, PT PY - 1946 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - LCIRC 837 DO - 10.6028/NBS.LCIRC.837 ER -