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200 1 $aThird International symposium on virus diseases of ornamental plants$eCollege Park, USA 11-15 September 1972
210   $a[The Hague]$c[ISHS]$d[1974?]
215   $a348 p.$cill.$d24 cm
225 1 $aActa horticulturae$v36
225 1 $aInternational society for horticultural science
300   $aIn calce al front.: Commission for plant protection , Working group virus diseases of ornamental plants.
517 1 $aThird international symposium on virus diseases of ornamental plants
610 0 $aPiante ornamentali$aMalattie
676   $a635.928$v23$zita
710 12$aInternational symposium on virus diseases of ornamental plants$d<3.$f; 1972$e; College Park>$01769334
712 02$aInternational Society for Horticultural Science
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996   $aThird International symposium on virus diseases of ornamental plants$94239158
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