Stanisław Pietkiewicz
Articles
Differential Isochrones: A map of temporal accessibility
Geographia Polonica (1968) vol. 13, pp. 5-8 | 
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Further information
, Faculty of Cartography Warsaw University
Moraines and dunes on small-scale maps
Geographia Polonica (1964) vol. 2, pp. 257-267 | Full text
Further information
, Faculty of Cartography Warsaw University