273861 Campbell, R. D. (1985). Ground training for the private pilot licence. Oxford : BSP Professional Books.
Chicago-viite (17. p.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
MLA-viite (9. p.)273861 Campbell, R. D. Ground Training for the Private Pilot Licence. Oxford : BSP Professional Books, 1985.
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