Funfstelliges Logarithmisches Tafelwerk: (Altgrad) by F. G. Gauss, H. Gobbin (3879195404 9783879195404 3-87919-540-4)
Bibliographie Zur Geschichte Des Vermessungswesens: Bibliography of the History of Surveying by Klaus Grewe (3879196044 9783879196043 3-87919-604-4)
