Engineering in the Ancient World, Revised Edition J. G. Landels http://books.google.fi/books?id=Q4aVmw1llwYC&pg=PP1&ots=OhPR6zpZBG&dq=J.G.+Landels.+Engineering+in+the+Ancient+World&sig=jPYlNAeN5JXMRZ_vhGwrq5MNMLc&redir_esc=y#v=onepage&q=J.G.%20Landels.%20Engineering%20in%20the%20Ancient%20World&f=false