the first volume of the D.G.B. came from about 1890. there are more than 100 volumes now. The language is German, and forthe earlier copies they used the old German characters, rather difficult!The first 20 volumes are avialable on 2 CD-Rom. Price about Deutsche Mark 90,-(US$ 45)plus handling and shipment. Try: email@example.comThey accept creditcard payment.