Empting and Filling System for the Third Set of Locks
Autoridad del Canal de Panamá
Attribution
<a rel="nofollow" class="external free" href="http://www.pancanal.com/esp/ampliacion/informes/informes-trimestrales/20090930.pdf">http://www.pancanal.com/esp/ampliacion/informes/informes-trimestrales/20090930.pdf</a>, page 101/242.