This information is about figure 3 in the paper. The model used to extract the T and beta is not identical in all of the experiments. The EOS data and the E895 data both use the Siemens and Rassmussen formula (prl 42,880) and it appears that FOPI (NPA 612,493) uses something similar but that is not as clear.  The NA49 point is from a combination of negative hadron and deuteron single particle spectra, and HBT results (NPA 638,91c).  The NA44 point uses protons, kaon+ , and pion+ with the Schnedermann model (PRC 48,2462).  This model is similar to the S&R formula, but has differences such as the flow profile, and possibly the freeze-out hypersurface.  The E866/E877 from the Stachel paper seems to imply the use of the method in the paper PLB 344,43 and that paper references to the Schnedermann paper.