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European Malus germplasm / Editor Helen J. Case . Rome :  Inter. Plant Genetic Res. Inst. , 1996 . 119 s . ISBN 92-9043-271-3 . [1, of that borrowed 0]

150 Years of agricultural research ; AFRC Institute of arable crops research . Long Ashton :  The Lawes Agricultural Trust , 1992 . 124 s . ISSN 0368-7708 . [1, of that borrowed 0]