"Accumulations." . . "International Energy Conversion Engineering Conference (7th : 2009 : Denver, Colo.)" . . . . . . . . . . . "Stirling convertor extended operation testing and data analysis at Glenn Research Center" . . . . . . . "Stirling cycle." . . "Radioisotope heat sources." . . "Stirling engines." . . . . "Thermal environments." . . "Piston engines." . . "Energy conversion efficiency." . .