WASH ST BULL NO37 NONMETALLICS PAGE 51WORKED AND SOLD FOR AGRICULTURAL PURPOSES BY AGRO MINERALS,DIRECTORY OF WASH MINING OPERATIONS 1971-72 PAGE 20EPSOM SALTSALSO WASH.BULL.37 NON-MET. PAGE 95INTERMITTENT PRODUCTION BY ARGO MINERALS, INC:,TONASKET, WAS