00514nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100001900076245006900095260004600164300000900210440003400219650007400253700001700327Para_4851CHAP220125s1920    xx            000 0 und d  a203292  cCHAP  aBoerner, E. G.  aA modified boerner sampler  /c by E. G. Boerner and E. H. Ropes  aWashington  :b Department of Agriculture  a8 p.  aEUA. Dep. of Agri. Bull.; 857  aAgricultura x Aparatos e instrumentos  Cereales x Selección masal  aRopes, E. H.