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![Cover for Ronald K. Hambleton · Item Response Theory: Principles and Applications (Pocketbok) [1st ed. Softcover of orig. ed. 1984 edition] (2010)](https://imusic.b-cdn.net/images/item/original/096/9789048158096.jpg?ronald-k-hambleton-2010-item-response-theory-principles-and-applications-pocketbok&class=scaled&v=1582584265)
![Cover for Ronald K. Hambleton · Item Response Theory: Principles and Applications (Inbunden Bok) [1985 edition] (1984)](https://imusic.b-cdn.net/images/item/original/651/9780898380651.jpg?ronald-k-hambleton-1984-item-response-theory-principles-and-applications-inbunden-bok&class=scaled&v=1614701928)