File:Delta IV Medium+ 4,2 with GOES P on Launch Pad 37B.jpg - Wikimedia Commons
LAUNCH COMPLEX 37 (DELTA IV) FACT SHEET
Delta IV - Wikipedia
The Boeing Company – Delta IV Launch Complex 37 Modifications - BRPH
File:Delta IV Medium 4.2+ (with GOES-N) on launch pad.jpg - Wikipedia
Space transport roundup Space-for-All at HobbySpace
Uncooperative Weather scrubs Delta IV Heavy Launch after extended Countdown – Spaceflight101
ULA Delta IV Heavy Rocket Rolled to Cape Launch Pad and Raised for Orion's First Flight - Universe Today
Uncooperative Weather scrubs Delta IV Heavy Launch after extended Countdown – Spaceflight101
File:Delta IV Medium 4,2+ launch with GOES-N.jpg - Wikipedia
Is a space shuttle a type of rocket? - Quora
The Boeing Company – Delta IV Launch Complex 37 Modifications - BRPH
Apollo iv hi-res stock photography and images - Alamy