@article{Willig2018, author = "Dierk Willig", title = "{Supplement 1: German military geology and military mining on the Eastern Front in World War I}", year = "2018", month = "10", url = "https://geolsoc.figshare.com/articles/journal_contribution/Supplement_1_German_military_geology_and_military_mining_on_the_Eastern_Front_in_World_War_I/7258013", doi = "10.6084/m9.figshare.7258013.v1" }