Hallenburg, James K. <br/><br/>
HP41C formation evaluation programs / 
James K. Hallenburg. 
 - Tulsa, Okla. :  PennWell,  1984. 
 - xiii, 105 p. :  ill. ;  29 cm. 
<br/><br/> Include a geologic time table in a disc form. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum--Geology--Data processing.<br/>Gas, Natural--Geology--Data processing.<br/>HP41C (Calculating--machine).