TY - JOUR T1 - Contributions towards the History of Azobenzol and Benzidine JF - Proceedings of the Royal Society of London (1854-1905) VL - 10 SP - 585 EP - 588 PY - 1859/01/01/ UR - http://dx.doi.org/10.1098/rspl.1859.0118 M3 - doi:10.1098/rspl.1859.0118 AU - Hofmann, P. ER -