- unitdate
-
{"value"=>"circa 1963-circa 1973", "type"=>"inclusive", "certainty"=>"approximate", "normal"=>"1963/1973"}
{"value"=>"n.d.", "type"=>"inclusive"}
- date_inclusive_start
-
1963
- date_inclusive_end
-
1973
- unittitle
-
{"value"=>"VI.A.1. National Institute for Medical Research, Mill Hill, London"}
- physdesc
-
{"value"=>"3 boxes", "format"=>"simple"}
- unitid
-
{"type"=>"local_mss", "value"=>"512998"}
- date_start
-
1963
- date_end
-
1973
- keydate
-
1963