I.P.D BF-1 Beija-Flor (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "I.P.D BF-1 Beija-Flor" in English language version.

refsWebsite

Global rank English rank

6^th place

6^th place

archive.org

Apostolo, Giorgio; Palmer, Valerie; Harris, S.M.; Rees, Elfan ap (1984). The illustrated encyclopedia of helicopters. New York: Bonanza Books. p. 121. ISBN 0-517-439352.