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Geoinformatica Polonica : the journal of Polish Academy of Arts and Sciences.
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Human nature an interdisciplinary biosocial perspective.
“…Aldine de Gruyter,…”
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Online Journal -
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Reiseveranstalter- und Reisevertriebs-Management : Funktionen? Strukturen? Prozesse.
“…De Gruyter Oldenbourg,…”
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Online Book