1. Energy costs and benefits; net energy;Bullard;Energy Syst. Policy,1976
2. Net Energy Analysis;Bullard,1976-1978
3. Cattle as competitors for biomass energy;Combs;Energy Agric.,1983
4. Embodied energy and economic valuation;Costanza;Science,1980
5. Energy Used for Processed Livestock Feed;Dovring,1981