00481    a2200145   4500082001600000100002300016245004300039260005100082300002100133440005900154650004600213650003700259650001300296700002600309  a631.62bROE  aRoe, Harry Burgess  aEngineering for agricultural drainage   aNew YorkbMcGraw-Hill Book Companyc1954g1954  axvii,501p.c24cm  aMcGraw - Hill publication in agricultural engineering   aSpecific techniques; equipment, materials  aClearing, drainage, revegetation  aDrainage  aAyres, Quincy Claude