You can now find 2011 media guides on the WTWH marketing site. The guides consist of both print and online information, editorial calendars and print specification sheets.
There is one comprehensive WTWH Media Guide covering the Design World Network, Windpower Engineering, Solar Power Engineering and the Renewable Energy Network.
The other streamlined media guide focuses just on Windpower and Solarpower Engineering.
If looking just for print ad specifications, those can be found at the top menu or here>>