Environmental Monitoring of Libraries with MonTreAL. In Jaap Kamps, Giannis Tsakonas, Yannis Manolopoulos, Lazaros Iliadis, and Ioannis Karydis (Eds.), Research and Advanced Technology for Digital Libraries, 599--602, Springer International Publishing, Cham, 2017. [PUMA: altbestand bamberg bibliothek klimadaten luftfeuchtigkeit magazin montreal pi projekt raspberry temperatur ub überwachung]