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- [7] Don't Miss the XXV FIG Congress in June 2014 GIM INTERNATIONAL-THE WORLDWIDE MAGAZINE FOR GEOMATICS, 2014, 28 (01): : 33 - 33
- [9] 2002 Lake states logging congress: Sponsorship information/ program' book Timber Producer, 2002, (07): : 24 - 25
- [10] 2002 Lake states logging congress: Sponsorship information/program book Timber Producer, 2002, (06): : 24 - 25