• Name: Aerial Surveys publication ¹⁾
• Note: Publication by bill53082014 on aerial_surveys ²⁾
• LINK: http://historicalaerials.wordpress.com/2014/03/02/2/ ³⁾
• Note: AerialSurveys.pdf ⁴⁾
• Type: Website ⁵⁾

Source