@book{ Solr-523257899, title = {Studien zu einer Theorie der Schulentwicklung}, series = {Beltz-Bibliothek}, author = {Rolff, Hans-Günter}, address = {Weinheim Basel}, publisher = {Beltz}, year = {2007}, note = {Literaturangaben}, url = {http://www.gbv.de/dms/bs/toc/523257899.pdf} url = {http://deposit.d-nb.de/cgi-bin/dokserv?id=2901474&prov=M&dok_var=1&dok_ext=htm} url = {https://swbplus.bsz-bw.de/bsz261230255rez.htm} }