[[http://swb2.bsz-bw.de/DB=2.340/CMD?ACT=SRCHA&IKT=1016&SRT=YOP&TRM=bbg%3Aas*+not+%28sge%3A291 OR 291X OR 291\%2F313 OR sa+19 OR lfer OR sa+18 OR sa+16*%29|ohne SB, SULB, HTW, Hist. Inst.]]