TY - GEN AU - Maxwell, B R C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1979-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.79-1911 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1979 TI - Procedures for testing, rating, and estimating the seasonal performance of engine-driven heat pump systems: ER -