Teaching and Learning AstronomyJay M. Pasachoff, John R. Percy, Jay Pasachoff, John PercyHäftad, 2009687 kr
Keeping the Red Flag Flying: The Democratic Socialist Party in Australian PoliticsJohn Percy, Allen Myers E-bok2021792 kr
Metallurgy; The Art Of Extracting Metals From Their Ores, And Adapting Them To Various Purposes Of ManufactureJohn PercyHäftad, 2007346 kr
