Air and gas drilling manual applications for oil, gas, geothermal fluid recovery wells, specialized construction boreholes, and the history and advent of the directional DTH per Lyons, William C., Stanley, James H., Sinisterra, Francisco J., Weller, Tom

Available for University of the Philippines System via ScienceDirect. Click here to access
Also available remotely for University of the Philippines System via ScienceDirect. Click here to access thru EZproxy

History in the digital age