Popular Mechanics - março 1987

Popular Mechanics - março 1987

https://books.google.pt/books?id=HOMDAAAAMBAJ&printsec=frontcover&hl=pt-PT&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=true

RCM - março 1971

RCM - março 1971

http://www.rclibrary.co.uk/files_titles/1687/RCM_1971_03_March.pdf

Flying - abril 1960

Flying - abril 1960

https://books.google.pt/books?id=RESxP6La5sUC&printsec=frontcover&hl=pt-PT&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=true

Livro - Profile Publications No. 014: Boeing P-26A

Profile Publications No. 014: Boeing P-26A - 1965

http://www.rclibrary.co.uk/files_titles/1686/Profile_014_Boeing_P26A.pdf

Model Aviation - julho 1986

Model Aviation - julho 1986

http://library.modelaviation.com/ma/1986/7