A. D. · A. o · Armstrong D. · O D
| title | ISBN-13 | year of publication |
|---|---|---|
| Armstrong Oil Directories: Rocky Mountain and Central United States, 2004 | 978-99937-47-30-7 | 2003 |
| Armstrong Oil Directory 2011 Rocky Mountain Regional | 978-1-223-00321-4 | 2010 |
| Armstrong Oil Directory 2012 Rocky Mountain Regional | 978-1-223-01266-7 | 2011 |
| Armstrong Oil Directory: 2013 Rocky Mountain Regional Directory | 978-1-223-01556-9 | 2012 |
| Armstrong Oil Directory: 2014 Rocky Mountain Regional Directory | 978-1-223-06628-8 | 2013 |
| Armstrong Oil Directory: 2015 Rocky Mountain Regional Directory | 978-1-223-06687-5 | 2014 |
| Armstrong Oil Directory: 2016 Rocky Mountain Regional Directory | 978-1-223-06753-7 | 2015 |
| Armstrong Oil Directory: 2017 Rocky Mountain Regional Directory | 978-1-222-99780-4 | 2016 |
| Armstrong Oil Directory: 2018 Rocky Mountain Regional Directory | 978-1-222-99801-6 | 2017 |