@base . a . , ; "Index to U.S. Government periodicals." ; ; ; ; ; "Index to U.S. Government periodicals." , "Index to U.S. Government periodicals" ; . a , ; "Index to U.S. Government periodicals" . . a ; "20230315131501.985956"^^ ; ; . a ; "0098-4604" ; . "Illinois" . a ; .