QuarryingQuarrying way down southContrafed PublishingNovember 25, 2021November 27, 2021 by Contrafed PublishingNovember 25, 2021November 27, 202103306 Gavin Hartley from Blackhead Quarries presented his Quarrying Way Down South paper to the Institute of Quarrying Otago/Southland Branch mini conference held in Gore 23-24...
