Ola Ahlqvist, Christoph Schlieder <br/><br/>
Geogames and Geoplay 

 - 1st ed. 2018 
 -  Springer International Publishing  2018 
 - Advances in Geographic Information Science .
<br/><br/><label>ISBN: </label>978-3-319-22774-0 
<br/><br/><label>ISSN: </label>1867-2442