Mistakes on Calc User Guide

I found some “Error: Reference source not found” on LibreOffice 4.1 Calc Guide(CG41-CalcGuideLO.pdf). For example on page 88, 251, and 274. I don't how to fix it. I don't know what the correction should be.

Muhamad Abdul Rosid

Thank you! I will correct these and reissue the PDF.

--Jean