Ian Tyers
David Chapman
D. G. Hull
Esmond Harris
Soil Survey of England & Wales
W. P. Hiern
Trevor Beer
David McClintock
Agnes G. Lewis
A. P. Tabraham
David Hunt
Edgar Thurston
Jean A. Paton
F. Hamilton Davey
Forestry Commission
Frank Turk
Government of Great Britain
Wendy Aldridge
S. J. Staines
Handbook ..
L. J. Margetts
Jim Castling
George Robert Gayre
Mary Cuddy
Frank Gibson
John Ayrton Paris
W. S. Hore
J. E. Lousley