The KB articles for July CU are available at the following locations:
KB 2882999 - SharePoint Foundation 2013 July 2014 CU
KB 2882989 - SharePoint Server 2013 July 2014 CU
KB 2882990 - SharePoint Server 2013 with Project Server July 2014 CU
KB 2883003 - Office Web Apps Server 2013 July 2014 CU
The Full Server Packages for July 2014 CU are available through the following links:
After installing the fixes you need to run the SharePoint 2013 Products Configuration Wizard on each machine in the farm.
Be aware that the SharePoint Server 2013 CU contains the SharePoint Foundation CU. And the SharePoint Server 2013 with Project Server CU contains Project Server CU, SharePoint Server CU and SharePoint Foundation CU.