TY - RPRT TI - Letter Circular 507: publications on polarimetry and its application to the sugars and their derivatives (revision of Letter Circular 272) PY - 1937 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - LCIRC 507r1937 DO - 10.6028/NBS.LCIRC.507r1937 ER -