@book{Buchanan1981ENES, author = {Buchanan, Briggs}, year = {1981}, publisher = {Yale University Press}, title = {Early {Near} {Eastern} seals in the {Yale} {Babylonian} {Collection}}, } @book{Frayne1997Ur, author = {Frayne, Douglas R.}, number = {vol. 3/2}, series = {Royal {Inscriptions} of {Mesopotamia} {Early} {Periods}}, year = {1997}, publisher = {University of Toronto Press}, title = {Ur {III} {Period} (2112-2004 {BC})}, } @misc{Tsouparoloulou2008diss, author = {Tsouparopoulou, Christina}, year = {2008}, title = {The {Material} {Face} of {Bureaucracy}: Writing, {Sealing} and {Archiving} {Tablets} for the {Ur} {III} {State} at {Drehem}}, type = {phdthesis}, } @book{Tsouparopoulou2015HSAO16, address = {Heidelberg}, author = {Tsouparopoulou, Christina}, number = {Band 16}, series = {Heidelberger {Studien} zum alten {Orient}}, year = {2015}, publisher = {Heidelberger Orientverlag}, title = {The {Ur} {III} seals impressed on documents from {Puzri}{\v s}-{Dag}{\= a}n ({Drehem})}, }