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Item Gear up -- throttle down!(North Dakota State University, 1979) Hauck, Duane; Hofman, Vernon L.Item Sunflower oil as a fuel alternative(North Dakota State University, 1980) Hofman, Vern; Dinusson, W. E.; Zimmerman, Don; Helgeson, Delmer L.; Fanning, CarlItem Energy efficiency labels(North Dakota State University, 1990) Hirning, Harvey J.Item Sunflower for power!(North Dakota State University, 1981) Hofman, Vern; Kaufman, Ken; Helgeson, Delmer; Dinusson, W. E.Item Calculating grain drying cost(North Dakota State University, 1987) Hellevang, Kenneth J.Item Tips for Saving Energy and Money for Renters(North Dakota State University, 2011) Pedersen, CarlItem Energy conserving windows(North Dakota State University, 1987) Hirning, Harvey J.Item Ground coupled heat pumps(North Dakota State University, 1986) Vogel, Lambert; Hirning, HarveyItem No-cost, Low-cost Home Energy-saving Tips(North Dakota State University, 2008) Pedersen, Carl; Hellevang, KennethItem Air-to-Air Heat Exchangers For Healthier Energy-efficient Homes(North Dakota State University, 2009) Hellevang, Kenneth; Pedersen, Carl