00600nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100001800076245016600094260004500260300001000305440004100315650004100356700003300397Para_4447CHAP220125s1918    xx            000 0 und d  a202421  cCHAP  aDedrick, B. W  aGrain-dust explosions :b investigation in the experimental attrition mill at the Pennsylvania State College  /c By B. W. Dedrick, R. B. Fehr and David J. Price  aWashington  :b Department of Agriculure  a54 p.  aEUA. Dept. of Agriculture Bull.; 681  aCereales x Investigación  Molinos  aFehr, R. B.  Price, David J.