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Copyright responsibility: I. Velcheva, E. Ivanova
Source: Journal of balkan ecology
Year published: 2002
Volume: 3
Pages: p. 311-317
ID: LTU090002137
Copyright responsibility: I. Velcheva, K. Sapundjieva, p. Kostadinova
Source: Bulgarian journal of agricultural science
Year published: 2001
Volume: 3
Pages: pg. 319-324
ID: LTU090012121
Copyright responsibility: I. Velcheva, p. Kostadinova
Source: Journal of balkan ecology
Year published: 2001
Volume: 2
Pages: pg. 225-227
ID: LTU090015189
Copyright responsibility: S. Baltova, I. Velcheva
Source: Bulgarian journal of agricultural science
Year published: 2005
Volume: 5
Pages: pg. 577-582
ID: LTU090019372
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