@book{4918,
	author = {Archenhold Sternwarte Berlin-Treptow and Archenhold, Friedrich Simon},
	title = {Aus dem letzten Jahresbericht der Heidelberger Sternwarte},
	publisher = {Carl Fr. Berg, vorm J. Windolff},
	year = {1933},
	address = {Berlin SW 68},
	url = {https://www.astw.de/publikationen/weltall/pdf/weltall_jg_32.pdf}
}