- unitid
-
{"value"=>"3612822", "type"=>"local_mss"}
{"value"=>"1549", "type"=>"local_mss_er"}
- unitdate
-
{"value"=>"2015", "type"=>"inclusive", "normal"=>"2015"}
- unittitle
-
{"value"=>"<span class=\"title\">On the Twentieth Century</span>"}
- physdesc
-
{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"5,387 computer files", "unit"=>"computer_files"}, {"name"=>"extent", "value"=>"60.9 gigabytes", "unit"=>"gigabytes"}]}
- date_start
-
2015
- keydate
-
2015
- date_end
-
2015
- date_inclusive_start
-
2015
- date_inclusive_end
-
2015