Riga 2:
Riga 2:
|back= Date on the back.
|back= Date on the back.
|guess= Guess date,
|guess= Guess date,
−
|seller= Dating provided by seller.
+
|seller= Dating given by the provider.
|copyright= Dating from copyright note.
|copyright= Dating from copyright note.
|backco= Dating from a copyright note on the back.
|backco= Dating from a copyright note on the back.
|google= Dating established by finding the page on Google Books.
|google= Dating established by finding the page on Google Books.
}}
}}