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21Publicado 1957Ames : Agricultural and Home Economics Experiment Station, 1957-1958.1 online resource (4 volumes) : illustrations.Center for Research Libraries: no.20-23 (Oct 1957-Aug 1958)
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22Publicado 1958Ames : [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State College?], 1958-1959.1 online resource (3 no.) : illustrations.Center for Research Libraries: no.124-126 (Feb 1958-Feb 1959)
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23Publicado 1959Ames : [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959-1969.14 volumes : illustrations ; 28 cm.Center for Research Libraries: no.127-140 (Jul 1959-Oct 1969)
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