@base . a , , ; , , ; "Unconventional petroleum " ; ; ; "0741-7721" ; ; "0741-7721" ; ; "0741-7721" ; "Unconventional petroleum " , "Unconventional petroleum" ; . a . a , ; "Unconventional petroleum" . . a ; "0741-7721" ; . "Tennessee" . a ; . a ; "0741-7721" ; . a ; ; "20050916104300.0"^^ ; ; .