Fundamental astronomy
Hannu Karttunen · Springer · 2003
Wikipedia
{{cite book |last=Karttunen |first=Hannu |title=Fundamental astronomy |publisher=Springer |year=2003 |isbn=9783540001799}}
Hannu Karttunen · Springer · 2003
{{cite book |last=Karttunen |first=Hannu |title=Fundamental astronomy |publisher=Springer |year=2003 |isbn=9783540001799}}