00536nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100002100076245008400097260006200181300001000243440004600253650004900299700001800348Para_4627CHAP220125s1935    xx            000 0 und d  a201812  cCHAP  aArmstrong, G. M.  aInvestigations on downy mildew of tobacco  /c G. M. Armstrong and C. B. Summer  aClemson, South Carolina  :b Clemson Agricultural College  a23 p.  aSouth Carolina Agri. Exp. Sta. Bull.; 303  aTabaco x Enfermedades  Moho azul del tabaco  aSummer, C. B.