<placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0006725 https://www.geonames.org/1524297"><choice> <abbr>Irt.</abbr> <expan>Irtisch</expan> </choice></placeName> vient du sud, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0007984 https://www.geonames.org/472776">Wolga</placeName> du nord <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0005449/58v"><choice> <abbr>p</abbr> <expan>page</expan> </choice> 114</ref>. <lb xmlns="http://www.tei-c.org/ns/1.0" />puis <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>différ</abbr> <expan>différences</expan> </choice> des saisons.