If you have the graph, make your own spreadsheet. Fox's or any other "graph" shouldn't be used as if it is good for 3 or 4 decimal places. . . . or make a nice personal request to Mccoy and he may provide a spreadsheet to you. I cannot pass it on without his permission - same with the paper although it is an old one. You could google Polous and Davis Elastic Solutions for Soil and Rock Mechanics - it can be downloaded on line and they have several pages on it.