TY - RPRT TI - Letter Circular 184: general report of the work of the railroad track scale testing service of the U.S. Bureau of Standards during the fiscal year, 1925:July 1, 1924 to June 30, 1925 PY - 1925 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - LCIRC 184 DO - 10.6028/NBS.LCIRC.184 ER -