reversed Polish-hook o

I've just noticed the comment quoted in the subject in the description
of

'LATIN SMALL LETTER TURNED DELTA' (U+018D)
        
and I'm intrigued how it got into the standard.

On Sun, May 31 2015 at 18:20 CEST, frederic.grosshans_at_gmail.com writes:

[...]

> The upper case was introduces for Sencoten, and the proposal is here
> http://www.unicode.org/L2/L2004/04170-sencoten.pdf
>
> (found by googling sencoten site:unicode.org)

I tried to google for the relavant document both unicode.org and
std.dkuug.dk but without any success.

Actually I intend to look up the history of all the Polonica in Unicode
and I will appreciate very much your advice what is the best way to
search for information.

Best regards

Janusz

-- 
                           ,   
Prof. dr hab. Janusz S. Bien -  Uniwersytet Warszawski (Katedra Lingwistyki Formalnej)
Prof. Janusz S. Bien - University of Warsaw (Formal Linguistics Department)
jsbien@uw.edu.pl, jsbien@mimuw.edu.pl, http://fleksem.klf.uw.edu.pl/~jsbien/