Bibliography:U.S. customary units
From Knowino
- Editors of The American Heritage Dictionaries (2005). The American Heritage Science Dictionary, 1st Edition. Houghton Mifflin. ISBN 0-618-45504-3.
- François Cardarelli (Author), M.J. Shields (Translator) (2004). Encyclopaedia of Scientific Units, Weights and Measures: Their SI Equivalences and Origins, 1st Edition. Springer. ISBN 1-85233-682-X.