John B. Gustavson -- Certified Member No. 1992-01
- Mineral Appraiser LLC
- 2265 Hillsdale Circle
- Boulder, Colorado, USA 80305
- Phone No: 1-303-818-5992
- Fax No: 1-303-499-7637
- Email: johngustavson1@aol.com
- Mineral Type: Oil & Gas, Most Minerals and Geothermal
- Geographic Area: USA & International
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- Membership Class: Certified
- Start Date: January 1, 1992
- Subscription Date: January 1, 2017
- Expiry Date: March 1, 2018
Certified