Beckmann, Johann, 1739-1811 |
A history of inventions and discoveries [Microform] / by John Beckmann ; translated from the German by William Johnston |
London : J. Bell, 1797. |
Beckmann, Johann, 1739-1811 |
A history of inventions, discoveries and origins / by John Beckmann ; translated from the german by William Johnston |
London : H.J. Bohn, 1846. |