http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Energy savings and breakeven costs for residential heat pump water heaters in the United States
National Renewable Energy Laboratory (U.S.)
1 online resource (76 pages) : color maps.
Description based on online resource (viewed Oct. 15, 2015).
Includes bibliographical references (pages 41-43).