SpringerLink (Online service) & White, W. B. (2018). Caves and Karst of the Greenbrier Valley in West Virginia (1st ed. 2018.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-319-65801-8
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service) και William B. White. Caves and Karst of the Greenbrier Valley in West Virginia. 1st ed. 2018. Cham: Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-65801-8.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service) και William B. White. Caves and Karst of the Greenbrier Valley in West Virginia. 1st ed. 2018. Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-65801-8.
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