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	1.	The effects on stuttering frequency of pairing punishment (response cost) with reinforcement. [electronic resource] by Halvorson, J A Producer: 19710915 In: Journal of speech and hearing research vol. 14 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Punishment of stuttering as a discriminative stimulus for reinforced fluency. [electronic resource] by Halvorson, J A Producer: 19740528 In: Journal of communication disorders vol. 6 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Patient admission anxiety and length of hospital stay. [electronic resource] by Halvorson, J A Cahoon, D D Sappington, J T Proefrock, D W Producer: 19860428 In: Military medicine vol. 151 Availability: No items available. Save to lists Add to cart (remove)

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