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	1.	Effects of age on the tryptophan requirement of laying hens. [electronic resource] by Wethli, E Morris, T R Producer: 19781027 In: British poultry science vol. 19 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	The tryptophan requirements of young laying pullets. [electronic resource] by Morris, T R Wethli, E Producer: 19781027 In: British poultry science vol. 19 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	The effect of feeding high levels of low-quality proteins to growing chickens. [electronic resource] by Wethli, E Morris, T R Shresta, T P Producer: 19760301 In: The British journal of nutrition vol. 34 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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