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Space Policy > 2016 > 38 > C > 30-38
Environmental Research > 2015 > 141 > Complete > 42-57
Renewable and Sustainable Energy Reviews > 2015 > 45 > C > 530-539
Przegląd Geologiczny > 2015 > Vol. 63, nr 10/3 > 1206--1214
The Reading Teacher > 66 > 7 > 520 - 530
Education and Information Technologies > 1999 > 4 > 3 > 311-327
Food Policy > 1996 > 21 > 2 > 229-241