Piano Accordion 'Chords' - for the Stradella System may be notated in several different ways. These should be noted in the 'Opus' above. This can look to the neophyte confusingly like normal piano notation, but it is all in the 'interpretation'!

Much good music was published previously in languages other than English, and in European countries. Good luck trying to find it by means other than sheer serendipity! But Mudcat has people in many countries around the world, you just never know...

Some easy to get hold of stuff first

Mel Bay at www.melbay.com have a large range of relevant books for the Piano and other Accordions.

A couple of examples (with CDs)

French Tangos for Accordion (Registrations & Accordion Chords)
Cafe Accordion (Registrations & Accordion Chords & Guitar Chords)

Also

Accordion Music Around the World (Accordion Chords & Guitar Chords)

Also

Jazz - and How! Alfred Music NY © 1959

Quote
There are 4 elements that go into the making of fine jazz:

1) Rhythmic variations in the original melody.
2) Harmonization of the melody line.
3) The addition of embellishing notes and runs to the melody line.
4) The addition of a more interesting melody line.
Unquote

This book details these steps for beginners in this field.

Accordion Ragtime per fisarmonica - Claude Noel (single item)
© 1963 Ricordi & Co Italy.


Internationale Solistenmappe
Italienische Solisten I
(marked Band 4 - one of a large series of various 'ethnic nationalities' styles)
Publisher Musicverlage Hans Geric - Koln
(marked '48 bass')
Several pieces - includes
Harmonika Boogie (1954) - Pizzigoni
others are various polka, waltz, Samba, Foxtrot, Tarentalla.


Georg Espitalier (born 1926)
Hora - Kolo - Oro
(2516) - some sort of identification number
Publisher: Eres Edition - Lilienthal/Bremen
7 pieces - Romanian and Yugoslavian including some pieces in 7/8 & 11/16 !!!


And two more easier to find modern ones

The Irish Piano Accordion
Waltons Music Inc Ireland (undated)


Beatles Accordion Songbook
Arranged by Pete Lee
ISBN 0-7119-6394-0
© 1998 Wise Publications
mentioned - available thru http:www.musicsales.co.uk
The company is mentioned with offices in UK & Australia (in this edition)
Others mentioned in the 'Accordion Songbook' series include
Jazz
Blues
Film & TV
Ballads
Show Tunes