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Gregory J W John Walter 1864 1932 : The rift valleys and geology of East Africa; an account of the origin & history of the rift valleys of East Africa & their relation to the contemporary earth-movements which transformed the geography of the world. With some account of the prehistoric stone implements, soils, water supply, & mineral resources of the Kenya colony / by J.W. Gregory ... With appendices on the edible earths, soils, fossils, rocks, & Masai place-names, by Prof. E.P. Cathcart ... Prof. R.A. Berry, R.B. Newton, esq., Miss Agnes Neilson, & A.C. Holles.
Gregory K E Keith Edward 1924 : Composite breeds to use heterosis and breed differences to improve efficiency of beef production / K.E. Gregory, L.V. Cundiff, and R.M. Koch ; in cooperation with the Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln.
Gregory K J Kenneth John : River channel management : towards sustainable catchment hydrosystems / Peter W. Downs, Kenneth J. Gregory.
Gregory Karl : An integrated approach to family work for psychosis : a manual for family workers / Gina Smith, Karl Gregory and Annie Higgs.