1. 01. English Non Fiction Military technology / by Fridell, Ron. Publication: Minneapolis : Lerner Publications Co., 2008 . 48 p. : 26 cm. Date:2008 Availability: Copies available: (1), Actions:
2. 01. English Non Fiction Spy technology / by Fridell, Ron. Publication: Minneapolis, Minn. : Lerner Publications Co., 2007 . 48 p. : 25 cm. Date:2007 Availability: Copies available: (1), Actions: