@base . a ; ; "20040609163900.0"^^ ; ; . a . a , , ; , , ; "Natural gas magazine." ; ; ; "0096-9737" ; ; "0096-9737" ; ; "0096-9737" ; "Natural gas magazine." , "Natural gas magazine" ; ; [ a ; "v.1-2 (1920-21); v.3 1922" ; "Preserved" ; "2024-03-01"^^ ; "v.1-2 (1920-21); v.3 1922" ; ; [ "0096-9737" ; "Natural Gas Magazine" ; "Natural Gas Publishing Co.]" ] ; "1920/1922" ; "https://catalog.hathitrust.org/Record/012455885" ] . a , ; "Natural gas magazine" . . "United States" . a ; . a ; "hathi" ; "HathiTrust" . a ; "0096-9737" ; . a ; "0096-9737" ; .