TY - RPRT TI - Circular of the Bureau of Standards no. 452: slip casting of clay pots for the manufacture of optical glass at the National Bureau of Standards AU - Heindl, Raymond A AU - Massengale, Gordon B AU - Cossette, Louis G. PY - 1946 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 452 DO - 10.6028/NBS.CIRC.452 ER -