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Copyright responsibility: S. Masheva, N. Velkov, N. Valchev
Source: Bulgarian journal of agricultural science
Year published: 2013
Volume: 5, 19
Pages: pg. 989-994
ID: LTU090045247

Copyright responsibility: N. Velkov, V. Petkova
Source: Agricultural Science and Technology
Year published: 2014
Volume: 2, 6
Pages: pg. 134-142
ID: LTU090054092

Influence of Herbagreen mineral fertilizer on seed production of cucumber, melon and zucchini;  
Copyright responsibility: N. Velkov, V. Petkova
Source: Agricultural Science and Technology
Year published: 2014
Volume: 1, 6
Pages: pg. 63-67
ID: LTU090054129
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