S.O.N.-R 51/2-17 : Snijders-Oomen non-verbal intelligence test : manual and research report / J.Th. Snijders, P.J. Tellegen, J.A. Laros ; [transl. from the Dutch by B.J. Wijnberg-Williams]Construction and validation of the SON-R 5-1/2-17, the Snijders-Oomen non-verbal intelligence test / J.A. Laros, P.J. Tellegen ; [transl. from the Dutch by B.J. Wijnberg-Williams]Construction and validation of the SON-R 5 1/2-17, the Snijders-Oomen non-verbal intelligence test / J.A. Laros, P.J. Tellegen ; [transl. from the Dutch by B.J. Wijnberg-Williams]