Okpokwasili, N. P., and Uwuma Sokari. “Book Preservation Techniques And Library Staff Awareness In Academic Libraries In Rivers State, Nigeria”. Journal of Research in Education and Society (JRES) , vol. 1, no. 2&3, Aug. 2010, pp. 125-31, http://icidr.org.ng/index.php/Jres/article/view/1138.