Bartholdy, J. (1987) “H.R. Langguth: List of terms ofhydrogeology, geochemistry and geothermals of mineral and thermal waters. (International contributions to hydrogeology; vol. 3)”., Geografisk Tidsskrift, 87. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/44434 (Set: 6 december 2025).