@incollection{Steffan2015, author = {Werner Steffan}, title = {Niedrigschwellige, lebensweltnahe Drogenarbeit}, booktitle = {Suchtkrankenhilfe}, series = {Lehrbuch zur Vorbeugung, Beratung und Therapie}, editor = {Elmar Fleisch and Reinhard Haller and Wolfgang Heckmann}, isbn = {3-407-55798-1}, year = {2015}, }