PERHT Newsletter Nr. 7 (May 2016) PERHT Newsletter Nr. 6 (December 2015) PERHT Newsletter Nr. 5 (March 2015) PERHT Newsletter Nr. 4 (October 2014) PERHT Newsletter Nr. 3 (March 2014) PERHT Newsletter Nr. 2 (December 2013) PERHT Newsletter Nr. 1 (April 2013)