TY - RPRT TI - Engineering manual for protective construction : part V heating and air conditioning of underground installations AU - Peavy, B A AU - Robinson, H E AU - Dill, R S PY - 1958 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6246 DO - 10.6028/NBS.RPT.6246 ER -