@base . . a , , ; , , ; "Astronomers' universe." ; ; ; ; "2197-6651" ; ; ; "2197-6651" ; ; "2197-6651" ; "Astronomers' universe." , "Astronomers' universe (Internet)" ; ; "http://link.springer.com/bookseries/6960" . a , ; "Astronomers' universe (Internet)" . a . a ; "1614-659X" ; . "United States" . a ; ; "20210206215600.0"^^ ; ; . a ; "2197-6651" ; . a ; .