1929-1930/ ca.

https://w3id.org/zericatalog/date/1929-1930 an entity of type: E52_Time-Span

(?) 
(?) 
1930-01-01T00:00:00Z 
1929-01-01T00:00:00Z 
1929-1930 
1929-1930/ ca. 
1929-1930/ ca. 
1929-1930 
1929-1930 

data from the linked data cloud