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	1.	[Bulgarian potassium-calcium zeolite in the prophylaxis of digestive tract disorders in calves]. [electronic resource] by Petkova, E Venkov, T Chushkov, P Dzhurov, A Stefanov, Ts Producer: 19830225 In: Veterinarno-meditsinski nauki vol. 19 Availability: No items available. Save to lists Add to cart (remove)
	2.	[Preventive effect of the preparation "Bulgarben" in calves with digestive disorders]. [electronic resource] by Petkova, E Venkov, T Chushkov, P Encheva, Iu Stefanov, Ts Producer: 19821029 In: Veterinarno-meditsinski nauki vol. 19 Availability: No items available. Save to lists Add to cart (remove)
	3.	[Prophylactic efficacy of Bulgarian potassium-calcium zeolite in digestion disorders in pigs]. [electronic resource] by Petkova, E Venkov, T Chushkov, P Stefanov, Ts Poshchakov, E Producer: 19830708 In: Veterinarno-meditsinski nauki vol. 19 Availability: No items available. Save to lists Add to cart (remove)

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