By National Geographic Society
By "Flying Magazine"
By N/A Calabrese
By H.P. Meyers
By Jim Boucher, etc.
By D. H. McIntosh and A.S.Thom
By G.H.A. Cole, W.G. Watton
By A.E. Roy, D. Clarke
By Mike Briggs
By D.A. Fee, J. O'Dea
By Geoffrey Alan Ozin, A. Arsenault
By Robin Sharp, Sharp, Robin
By Rheal Drisdelle
By R. A. Penfold
By J.R.L. Hartley, D.L. Misell, Hartley, J.R.L., Misell, D.L.
By Arthur Atkinson, Atkinson, Arthur
By Steve Cooper
By Sue Warn, Warn, Sue
By Nigel Yates, Yates, Nigel
By W.J.C. Roberts, Roberts, W.J.C.
By Frank J. Fabozzi, Irving M. Pollack
By Ralph J. Fessenden, Joan S. Fessenden, Fessenden, Ralph J., Joan S.
By M. Fogiel
By Inc Staff Jeppesen Sanderson
By Wolfgang Schlager
By Mary Boole
By J. R. Hale