Wieland, Theodor Max Planck Institute for Medical Research, Max Planck Society;
http://science.sciencemag.org/content/159/3818/946/tab-pdf (Any fulltext)
https://doi.org/10.1126/science.159.3818.946 (Any fulltext)
Wieland, T. (1968). Poisonous Principles of Mushrooms of the Genus Amanita. Science, 159(3818), 946-952. doi:10.1126/science.159.3818.946.