May 29, 1962. Retrieved 2015-03-17."Utilization of Powered Scaffolds for Window Cleaning and Building Maintenance Suspended". The Building Industry. 26-27: 24. 1962.Ball, Matt (October 18, 2004). "MSN Money article". Web.archive.org. Archived in the first on May 9, 2006. Retrieved 2014-05-14. 2003-10-16. Archived in the original on 2009-… Read More