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<br /> <br />" <br /> 0 <br /> 0 <br /> N- <br />" ~ <br />, <br />, ~ <br />~ <br />, <br /> <br />10 <br /> <br />, <br />! <br />" <br />" <br />I <br />"i <br /> <br /> <br />Illustrations <br /> <br />Fip;ure No. <br /> <br />Title <br /> <br />Follows <br />Pa.e:e No. <br /> <br />18 Trend of Sand-Gravel Production in AWR Basins......... 140 <br /> <br />19 Trend of Stone Production in AWR Basins (Exclusive of <br />Texas, New Mexico, and Colorado).................... 148 <br /> <br />20 Nonmetallic Minerals (Chemicai and Industrial)........ 158 <br /> <br />21 Nonmetallic Mineral Industries (Chemical and Industrial) 158 <br /> <br />22 <br /> <br />Trend of Barite Production in AWR Basins (Arkansas)... <br /> <br />23 <br /> <br />Trend of Glass Sand Production in AWE Basins.......... <br /> <br />viii <br /> <br />158 <br />164 <br />