Units of information

International Standard ISO 31-4: Quantities and units, Part 4: Heat. Annex B (informative): Other units given for information, especially regarding the conversion

Accounting Units and Cataloging Units. U.S. Geological Survey. [2011-03-18]. （原始内容存档于2012-04-27）.  San Joaquin River. Geographic Names Information System

Units. 2905. ISBN 0-940228-47-5. Helfman, G., B. Collette i D. Facey: The diversity of fishes. Blackwell Science, Malden, Massachusetts, Estats Units

27, 2010].  Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging Units. U.S. Geological Survey. [August 22, 2010].

Names Information System. United States Geological Survey. [2011-01-27].  Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging