Klein, Ursula Department Experimental Systems and Spaces of Knowledge, Max Planck Institute for the History of Science, Max Planck Society;
Klein, U. (2008). A historical ontology of material substances: c. 1700-1830. In K. Ruthenberg, & J. v. Brakel (Eds.), Stuff: the nature of chemical substances (pp. 21-42). Würzburg: Königshausen & Neumann.