- unitdate
-
{"value"=>"1960 - 1973", "type"=>"inclusive", "normal"=>"1960/1973"}
{"value"=>"undated", "type"=>"inclusive"}
- date_inclusive_start
-
1960
- date_inclusive_end
-
1973
- unittitle
-
{"value"=>"Metropolitan Opera Association,"}
- container
-
{"type"=>"box", "value"=>"1"}
{"type"=>"folder", "value"=>"22"}
- unitid
-
{"type"=>"local_mss", "value"=>"812812"}
- date_start
-
1960
- date_end
-
1973
- keydate
-
1960