The Geology of a Glasgow Allotment
Von Engeln, O.D., 1914. Effects of continental glaciation on agriculture. Part I. Bulletin of the American Geographical Society, 46(4), pp.241-264.
Von Engeln, O.D., 1914. Effects of Continental Glaciation on Agriculture. Part II. Bulletin of the American Geographical Society, 46(5), pp.336-355.
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