- unitid
-
{"value"=>"1001957", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1857", "type"=>"inclusive", "normal"=>"1857"}
{"value"=>"1858", "type"=>"inclusive", "normal"=>"1858"}
- date_inclusive_start
-
1857
- date_inclusive_end
-
1858
- keydate
-
1857
- date_start
-
1857
- date_end
-
1858
- unittitle
-
{"value"=>"Maps of the Harlem River at Macombs's dam"}
- container
-
{"type"=>"box", "value"=>"18"}
{"type"=>"folder", "value"=>"16"}