GL20 CONFERENCE PROCEEDINGS Twentieth International Conference on Grey Literature 'Research Data Fuels and Sustains Grey Literature'. - Loyola University New Orleans, USA December 3-4, 2018 / compiled by D. Farace and J. Frantzen ; GreyNet International, Grey Literature Network Service. – Amsterdam : TextRelease, February 2019. – 161 p. – Author Index. – (GL Conference Series, ISSN 1386-2316 ; No