Digital Libraries at the Crossroads of Digital Information for the Future 21st International Conference on Asia-Pacific Digital Libraries, ICADL 2019, Kuala Lumpur, Malaysia, November 4-7, 2019, Proceedings - Jatowt, Adam; Jatowt, Adam; Maeda, Akira; Maeda, Akira; Syn, Sue Yeon; Syn, Sue Yeon (Springer International Publishing : Imprint: Springer, 2019)