References:
- https://www.trails.com/list_33376_what-rivers-flow-baltic-sea.html
- http://www.britannica.com/place/Latvia
- http://www.atlasobscura.com/
- https://en.wikipedia.org/wiki/List_of_countries_by_Internet_connection_speeds
- http://izgudrojumi.lza.lv/proto_e.php?id=34
- http://www.everyculture.com/Ja-Ma/Latvia.html