TY - GEN AU - Harry J Keegan AU - Wiley A Hall AU - Gladys M Haas C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1956-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.4591 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1956 TI - Spectrophotometric and colorimetric study of diseased and rust resisting cereal crops: ER -