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Copyright responsibility: R. Binev, p. Petkov, A. Rusenov
Source: Bulgarian journal of veterinary medicine
Year published: 2003
Volume: 1
Pages: pg. 47-54
ID: LTU090011574
Copyright responsibility: I. Ivanov, R. Petkov
Source: Journal of balkan ecology
Year published: 1998
Volume: 1
Pages: pg. 109-114
ID: LTU090014753
Pages:
