TY - RPRT TI - Circular of the Bureau of Standards no. 115 3rd edition: United States government master specification for tires, pneumatic and solid tires, and inner tubes PY - 1927 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 115e3 DO - 10.6028/NBS.CIRC.115e3 ER -