What do demand-driven e-lending, e-acquisition and e-cataloguing activities really cost : a case study in Tallinn University of Technology Library [Online resource]Kont, Kate-RiinProceedings of the IATUL conferences. Paper 12018 / [11] p https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=2227&context=iatul https://iatul2018.hioa.no/program/abstracts/abstracts-posters/#8 https://docs.lib.purdue.edu/iatul/2018/posters/1/