WALAI AutoLIB – RSSRSSWALAI AutoLibDiscrete mathematical structures /Bernard Kolman, Robert C. Busby, Sharon Ross.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00028329<img src="https://www.opac.sskru.ac.th/bookcover/28329/28329-fc-t.gif" align="left" height="150" width="120"/>120726Discrete mathematics /Kenneth P. Bogart.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00028264<img src="https://www.opac.sskru.ac.th/bookcover/28264/28264-fc-t.gif" align="left" height="150" width="120"/>120725