Sioli, Harald Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;
Sioli, H. (1968). Hydrochemistry and Geology in the Brazilian Amazon Region. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 1(3), 267-277.