TY  - BOOK
AU  - Langdon,William K
TI  - Movable insulation: a guide to reducing heating and cooling losses through the windows in your home 
SN  - 0878572988
AV  - TH1715 .L34 1980
U1  - 693.8 
PY  - 1980///]
CY  - Emmaus, Pa.
PB  - Rodale Press
KW  - Dwellings
KW  - Insulation
KW  - Windows
N1  - Includes bibliographical references (pages 352-358) and index; Also issued online
N2  - On title page: A guide to reducing heating and cooling losses through the windows in your home
ER  -