- unitid
-
{"value"=>"3009203", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1836-1937", "type"=>"inclusive", "normal"=>"1836/1937"}
{"value"=>"undated", "type"=>"inclusive"}
- unittitle
-
{"value"=>"Electric, Elevated, Street"}
- container
-
{"type"=>"box", "value"=>"14"}
{"type"=>"folder", "value"=>"3"}
- date_start
-
1836
- keydate
-
1836
- date_end
-
1937
- date_inclusive_start
-
1836
- date_inclusive_end
-
1937