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	1.	[Factors affecting the quality of indicator tubules for determining harmful gases and fumes in the air of a work environment]. [electronic resource] by Velichkova, V Producer: 19820109 In: Problemi na khigienata vol. 6 Availability: No items available. Save to lists Add to cart (remove)
	2.	[Quantitative determination of 3,4-benzopyrene by paper chromatography]. [electronic resource] by Velichkova, V Vasileva, R Producer: 19770825 In: Problemi na khigienata vol. 1 Availability: No items available. Save to lists Add to cart (remove)
	3.	[Current trends in improving the accuracy of indicator tubes]. [electronic resource] by Vardev, P Velichkova, V Producer: 19840502 In: Problemi na khigienata vol. 8 Availability: No items available. Save to lists Add to cart (remove)
	4.	[Effect of certain factors on the quality of the indicator tubules for determining hydrogen sulfide]. [electronic resource] by Velichkova, V Panova, N Producer: 19810226 In: Problemi na khigienata vol. 5 Availability: No items available. Save to lists Add to cart (remove)
	5.	[Indicator tubes with a noncylindrical form for indicator packing]. [electronic resource] by Mikhaĭlov, G Velichkova, V Vardev, P Producer: 19890512 In: Problemi na khigienata vol. 13 Availability: No items available. Save to lists Add to cart (remove)
	6.	Industrial evaluation of "Hygitest" detector tubes for ethyl acetate. [electronic resource] by Panova, N Velichkova, V Panev, T Producer: 19940502 In: Polish journal of occupational medicine and environmental health vol. 6 Availability: No items available. Save to lists Add to cart (remove)
	7.	[A comparative study in the treatment of complicated wounds following obstetrical-gynecological interventions]. [electronic resource] by Milchev, N Krumov, G Delev, P Piperkov, T Velichkova, V Kiusepashova, Ts Producer: 19940201 In: Akusherstvo i ginekologiia vol. 31 Availability: No items available. Save to lists Add to cart (remove)