Media Manager Namespaces Choose namespace [root] artwork copyright_files data lib plugins playground research s5 study wiki Media Files Media Files Upload Search Search in lib Thumbnails Rows Name Date Apply Search file name: Search File View History study:engstrom-1987-polanyi.png Date:2013/04/22 17:40 Filename:engstrom-1987-polanyi.png Format:PNG Size:35KB Width:651 Height:346 References for:activity_theory