It would be good to have a single thread for all resources- online or offline- on number bases to be posted up. So here we are then. Feel free to add your own and any commentary.

The DSA website: http://dozenal.org/
The OLD DSA website: http://polar.sunynassau.edu/~dozenal/
The DSGB website: http://www.dozenalsociety.org.uk/
Phi/Golden ratio: http://www.mcs.surrey.ac.uk/Personal/R.Kno...ci/phigits.html
Duodecimal Links: http://www.madras.fife.sch.uk/maths/linksduodec.html

Jean Essig's 1955 book, "DOUZE notre dix futur" [TWELVE: our future ten]

Hi, I'm new to this forum but always have been interested in base 12 and other number bases.

See my website at http://www.geocities.com/gerben47 to find some resources on Base 12.

I've printed out the page to study later - and will add your suggestions to the pages on our site.
NB the DSGB address has changed to http://www.dozenalsociety.org.uk. (The old pages at orbix just forward you to the new pages).

add this one - a rather mixed site, but lots of dozenal stuff:

http://dreamwater.org/whittenword/measure

There are two landmark websites that reinforce dozenist thought, outside those of the Societies. These are:

Prof. William Lauritzen | Versatile Numbers: Self-Organization, Emergence and Economics
http://www.earth360.com/math-versatile.html
Answers "what is the best base". This paper forms much of a case for dozenal, I suppose. Lauritzen has more to offer on his website, including his own numerals (I have actually just "discovered" these.) One may not agree completely with his thoughts, but his "Versatile Numbers" is rock solid as the core of the reason why dozenal makes the best sense as a base, over any other number.

Takashi Suga | Universal Unit System
http://www.asahi-net.or.jp/~dd6t-sg/univunit-e/index.html
This paper devises a system of metrication based on scientific constants like the speed of light and Planck units. It is nothing less than a thorough rebasing of the metric system with dozenal and current scientific constants as its basis. The proposals are wonderfully presented and professionally based. Suga details the ability of dozenal to better encapsulate math and physical constants. Though some may not agree on the definition of time presented in the paper, we might remember that the time proposal might only be applied scientifically, and a more earth-based system be devised for everyday use.

It would be interesting to read what you all think about these.

Not strictly a resource, but a very interesting a concrete example of the mood in the USA to the use of Customary measures vs Metric (SI).

Caltrans - California Department of Transport

Andrews, Frank Emerson. New Numbers: How acceptance of a duodecimal base would simplify mathematic. New York: Harcourt, Brace, and Company, 1935.

Same book but different printing that may be easier to find in the U.K.
London,
Faber and Faber Limited
24 Russel Square
Printed by University Press Cambridge
May MCMXXXVI (1936)

Also the following, which I expect along with the other books mentioned such as Essig's are all in the DSGB library as well as my own.

George S. Terry
Dozen System, The, An Easier Method of Arithmetic
Longmans Green And Co.
London . New York . Toronto
MCMXLI (1941)

Engineer Rear-Admiral G. Elbrow
New English System of Money, Weights and Measures and of Arithmetic, The
P.S. King & Son
Orchard House, Westminster, London
1913

Make your own scientifically grounded systeme internationale de unites...

A great resource that gives the latest values for fundamental physical constants is Physics Today's annual buyer's guide (I guess, to be found at your local university library. Where there are engineers and scientists, there is Physics Today). They state the CODATA (International Council for Science : Committee on Data for Science and Technology).

Haven't used it, but NIST (US institute of science and technology) has a website that will give you the same data. http://physics.nist.gov/cuu/Constants/

Just what is the latest value for the speed of light in a vacuum? how about the electron mass, or bohr radius? It's all there.

I was about to build a dozenal system of units BUT discovered Suga's aforementioned system and don't believe anything I might do would hold a candle to that work.