A practical Treatise on Metallurgy, adapted from the last German edition of Professor K.'s Metallurgy, by W. Crookes and E. Röhrig ... Illustrated, etc (1868)
CROOKES, William - Sir, ROEHRIG, Ernst Otto., KERL, Bruno. · leaf 228
British Library · HMNTS 7106.ee.8. · Digitised by the British Library with Microsoft · No known copyright restrictions (public domain). Free to use for anything.