- unitid
-
{"value"=>"3374524", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1928", "type"=>"inclusive", "normal"=>"1928"}
{"value"=>"1931", "type"=>"inclusive", "normal"=>"1931"}
- unittitle
-
{"value"=>"Discos Mexicanos"}
- container
-
{"type"=>"box", "value"=>"440"}
{"type"=>"folder", "value"=>"10"}
- date_start
-
1928
- keydate
-
1928
- date_end
-
1931
- date_inclusive_start
-
1928
- date_inclusive_end
-
1931