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	1.	Attrition from after school programs: characteristics of students who drop out. [electronic resource] by Weisman, S A Gottfredson, D C Producer: 20020129 In: Prevention science : the official journal of the Society for Prevention Research vol. 2 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Race and sex differences in the prediction of drug use. [electronic resource] by Gottfredson, D C Koper, C S Producer: 19970206 In: Journal of consulting and clinical psychology vol. 64 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	A meta-analytic inquiry into the relationship between selected risk factors and problem behavior. [electronic resource] by Najaka, S S Gottfredson, D C Wilson, D B Producer: 20020719 In: Prevention science : the official journal of the Society for Prevention Research vol. 2 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	A school-based social competency promotion demonstration. [electronic resource] by Skroban, S B Gottfredson, D C Gottfredson, G D Producer: 19990405 In: Evaluation review vol. 23 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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