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The Geographical Journal > 189 > 1 > 18 - 24
Transactions of the Institute of British Geographers > 46 > 3 > 675 - 688
Nutrient Cycling in Agroecosystems > 2016 > 104 > 3 > 265-279
Space Policy > 2015 > 32 > Complete > 54-57
Journal of Great Lakes Research > 2015 > 41 > Supplement 1 > 108-118