- unitid
-
{"value"=>"3370256", "type"=>"local_mss"}
{"value"=>"684499", "type"=>"local_mss_av"}
- unitdate
-
{"value"=>"1964", "type"=>"inclusive", "normal"=>"1964"}
- unittitle
-
{"value"=>"Mercury Pre-Production Copy"}
- physdesc
-
{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"1 audio recording", "unit"=>"audio_recordings"}]}
- scopecontent
-
{"value"=>"<p>Not overdubbed.</p>"}
- date_start
-
1964
- keydate
-
1964
- date_end
-
1964
- date_inclusive_start
-
1964
- date_inclusive_end
-
1964
- extent_statement
-
1 audio recording