No API guide for old UI5 lib version 1.28.27?

In SAPUI5 SDK website the API reference is only for the newest SAPUI5 v 1.32.9.

But the latest release for UI5 run-time in NW for java is v 1.28.27 so how / where can I find the API reference for v 1.28.27 ?

I need to look at how the viz charts api in v 1.28.27 because my chart works fine in v 1.32 from SAP SDK link but not in v 1.28.27 in my local NW java.