WALAI AutoLIB – RSSRSSWALAI AutoLibNorthstar :building skills for the toefl ibt, high intermediate student book with audio cds /Helen Solorzano.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00033757<img src="https://www.opac.sskru.ac.th/bookcover/33757/33757-fc-t.gif" align="left" height="150" width="120"/>130620Northstar. Building skills for the TOEFL iBT : high intermediate / Helen S. Solorzano.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00001359<img src="https://www.opac.sskru.ac.th/bookcover/1359/1359-fc-t.gif" align="left" height="150" width="120"/>520310Northstar :Buliding skills for the TOEFL iBT Advance /Linda Robinson Fellag.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00004999<img src="https://www.opac.sskru.ac.th/bookcover/4999/4999-fc-t.gif" align="left" height="150" width="120"/>520429Northstar :Buliding skills for the TOEFL iBT high intermediate /Helen S. Solorzano.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00004998<img src="https://www.opac.sskru.ac.th/bookcover/4998/4998-fc-t.gif" align="left" height="150" width="120"/>520429Northstar :Buliding skills for the TOEFL iBT intermediate /John Beaumont .http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00004997<img src="https://www.opac.sskru.ac.th/bookcover/4997/4997-fc-t.gif" align="left" height="150" width="120"/>520429