| Chapter  A | 
                                Colorado areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  B | 
                                Wyoming areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  C | 
                                Montana areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  D | 
                                North Dakota areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  E | 
                                South Dakota areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  F | 
                                Nebraska areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  G | 
                                Kansas areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  H | 
                                Oklahoma areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  I | 
                                Utah areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. | 
                            
                            
                            
                                | Chapter  J | 
                                New Mexico areas of oil and gas production | 
                                Mast, Richard F.; Root, D. H.; Williams, L. P.; Beeman, W. R. |