Lockheed U-2 (Finnish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Lockheed U-2" in Finnish language version.

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archive.today

The CIA and the U2 Program 1998 (englanniksi). Central Intelligence Agency – History Staff.

Gregory W. Pedlow ja Donald E. Welzenbach: The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs 1954-1974, s. 79-80. (Hyväksytty vapaasti julkaistavaksi 25.6.2013. National Security Archive, George Washingtonin yliopisto) History Staff, Central Intelligence Agency, 1992. Teoksen verkkoversio.

ER-2 Capabilities and Performance Dryden Flight Research Center. 30.6.2005. NASA. Arkistoitu 20.5.2017. Viitattu 9.1.2016. (englanniksi)
Gibbs, Yvonne: ER-2 Performance and Specifications NASA. 23.4.2018. Arkistoitu 1.5.2017. Viitattu 13.10.2018 (englanniksi).

ER-2 Capabilities and Performance Dryden Flight Research Center. 30.6.2005. NASA. Arkistoitu 20.5.2017. Viitattu 9.1.2016. (englanniksi)
Gibbs, Yvonne: ER-2 Performance and Specifications NASA. 23.4.2018. Arkistoitu 1.5.2017. Viitattu 13.10.2018 (englanniksi).