Friedman, YonaUNESCO. Human Settlements and Socio-Cultural Environment2009-03-162009-03-161991http://hdl.handle.net/10625/37595http://unesdoc.unesco.org/images/0008/000876/087695eb.pdfhttp://unesdoc.unesco.org/images/0009/000908/090863eb.pdfText2 digital files : ill.Application/pdfenROOFSLOW COST HOUSINGCONSTRUCTION TECHNIQUESCONSTRUCTION MATERIALSENGINEERING DESIGNSELF HELPINDIARoofsManual