ark:/88737: date: 2018.06.29 manager: n2t na_policy: NP | (:unkn) unknown | 2018 | name: Duke Visible Thinking (=) VISIBLETHK redirect: https://visiblethinking.duke.edu/ark:$id type: naan ark:/88737/t7: date: 2018.06.29 manager: ezid minter: https://n2t.net/a/ezid/m/ark/88737/t7 name: Visible Thinking type: shoulder