Steele, Henry B.. "I. The Need for Adequate Statistical Data Concerning Trends in the Cost of Drilling and Completing Oil and Gas Wells." Rice Institute Pamphlet - Rice University Studies, 49, no. 2 (1963): http://hdl.handle.net/1911/62854.
Except where otherwise noted, this item's license is described as This material is in the public domain and may be freely used, with attribution given to Rice University. This work is licensed under a Creative Commons Attribution 3.0 Unported License.