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	The Problem Of Space Travel: The Rocket Motor by Hermann Potočnik Noordung 4.70 avg rating — 10 ratings — published 1929 — 6 editions Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	The Problem of Space Travel: The Rocket Motor by Herman Potocnik Noordung really liked it 4.00 avg rating — 3 ratings — published 2010 — 1 edition Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	The Problem of Space Travel: The Rocket Motor by National Aeronautics and Space Administration, Hermann Noordung, Ernst Stuhlinger (Editor) 4.50 avg rating — 2 ratings — 2 editions Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	The Problem of Space Travel: The Rocket Motor by Hermann Noordung, Herman Potocnik Potocnik 4.50 avg rating — 2 ratings — published 2015 — 1 edition Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars