akkadian empire ass assyrian atomic units avoirdupois babylonian calendar babylonian mathematics bronze age canadian units centimetre gram second system of units chinese units of measurement city cubit decimal dutch units of measurement early dynastic period elam finnish units of measurement french units of measurement geodesy geometrized unit system german units of measurement gravitational metric system gudea guild hindu units of measurement history of measurement systems in india international system of units japanese units of measurement kingdom letter of nanse list of unusual units of measurement maltese units of measurement mesures usuelles metre-tonne-second system of units metric system metrology natural units near east nippur norwegian units of measurement numeral obsolete scottish units of measurement pegu weights and measures persian empire persian units of measurement phoenicia planck units romanian units of measurement sexagesimal statues of gudea sumer sumerian architecture swedish units of measurement systems of measurement taiwanese units of measurement third dynasty of ur troy weight ugarit united states customary units urartu uruk period