- unitid
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{"value"=>"3569566", "type"=>"local_mss"}
{"value"=>"11", "type"=>"local_mss_er"}
- unitdate
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{"calendar"=>"gregorian", "era"=>"ce", "type"=>"inclusive", "value"=>"1930s-2020s"}
- unittitle
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{"value"=>"Video About 谈论常宝霆和常氏家族"}
- physdesc
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{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"1 computer files", "unit"=>"computer_files"}, {"name"=>"extent", "value"=>"1.0 gigabytes", "unit"=>"gigabytes"}]}