Secondary Sources

http://books.google.com/books?hl=en&lr=&id=Kgh9q23lSOEC&oi=fnd&pg=PR9&dq=individual+change+disaster+&ots=tt8fYbsRH4&sig=_rtSLIoAvio7jeobMw43bRpOyW8#v=onepage&q=individual%20change%20disaster&f=false

http://www.crid.or.cr/digitalizacion/pdf/eng/doc2573/doc2573-4a.pdf