P. J. Hilton

Calculus of Variations by Parallel Displacement

W. S. Kimball, P. J. Hilton, P. J. Hilton, 1954 .

Manufacture of tea in Central Africa, 1975.

P. J. Hilton, 1974 .

Estimation of the market value of Central African tea by theaflavin analysis

R. T. Ellis, P. J. Hilton, P. Hilton, 1972 .