00558nam a2200157Ia 4500001001000000003000500010008004100015010001100056040000900067100001900076245011900095260006400214300001000278440005000288650006200338Para_4043CHAP220125s1934    xx            000 0 und d  a202513  cCHAP  aLehman, Samuel  aContaminated soil and cultural practices as related to occurrence and spread of tobacco mosaic  /c Samuel Lechman  aRaleigh North Carolina  :b Agricultural Experiment Station  a43 p.  aNorth Carolina. Agr. Exp. Sta. Tech. Bull; 46  aMosaico del tabaco  Suelos tabacaleros x Contaminación