TY - GEN AU - S Robert Hastings AU - Richard W Crenshaw C2 - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD DA - 1977-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BSS.104 LA - en PB - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD PY - 1977 TI - Window design strategies to conserve energy: ER -