Day, Harry G. ELMER V. McCOLLUM: Van boerenzoon tot voedingsonderzoeker Een biografie Kreps, Elmer Harry Camp And Trail Methods: Interesting Information For All Lovers Of Nature, What To Take And What To Do Kreps, Elmer Harry Science of Trapping; Describes the fur Bearing Animals, Their Nature, Habits and Distribution, With Practical Methods for Their Capture Erickson, Harry Elmer Dynamometers in General Sök bara efter: Erickson, Harry Elmer
