- unitid
-
{"value"=>"3145395", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1960", "type"=>"inclusive", "normal"=>"1960"}
{"value"=>"undated", "type"=>"inclusive"}
- unittitle
-
{"value"=>"Metropolitan Opera House, New York City"}
- scopecontent
-
{"value"=>"<p>Includes Paul Schöffler, Mihály Székely, Joel Berglund, Set Svanholm, Martha Lipton, James McCracken, Calvin Marsh, Blanche Thebom, Birgit Nilsson, Helen Traubel, and others</p>"}
- container
-
{"type"=>"box", "value"=>"9"}
{"type"=>"folder", "value"=>"3"}
- date_start
-
1960
- keydate
-
1960
- date_end
-
1960
- date_inclusive_start
-
1960
- date_inclusive_end
-
1960