- unitid
-
{"value"=>"728488", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1952", "type"=>"inclusive", "normal"=>"1952"}
{"value"=>"1953", "type"=>"inclusive", "normal"=>"1953"}
- unittitle
-
{"value"=>"Festival Hall, London"}
- container
-
{"type"=>"box", "value"=>"37"}
{"type"=>"folder", "value"=>"53"}
- date_start
-
1952
- keydate
-
1952
- date_end
-
1953
- date_inclusive_start
-
1952
- date_inclusive_end
-
1953