Here is a good reference book by WOJCIECH STELA
While this book is principally in Polish the descriptions are also in English and German. It is 254 pages long, hundreds of black and white photographs, sadly no color photos of badges. It also has listings of manufacturers ( gravurs) and tons of paperwork, ( legitymacja) The original photos of the early military units are fascinating on thee own. Anyone interested in collecting the early 20th century would enjoy having this reference book. It includes appendixes that list units, recipients of orders, etc.
Polskie Odznaki Honorowe I Pamiatkowe
1914-1918 & 1918-1921 (wojny o granice panstwa)
Polish Honor and Commemorative Badges
1914-1918 & 1918-1921 (warfare to establish the country's borders)
Polnische Ehrenzeichen Und Erinnerungsabzeichen
1914-1918 & 1918-1921 ( Krieg um die Grenzen)
It even features a section on fantasy badges.....badges that appear in other scholarly references as legitimate or authentic.