TY  - RPRT
TI  - Spectrophotometric and colorimetric change in the leaf of a white oak tree under conditions of natural drying and excessive moisture 
AU  - Keegan, Harry J
AU  - Schleter, John C
AU  - Hall, Wiley A
PY  - 1955
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 4322
DO  - 10.6028/NBS.RPT.4322
ER  -