with Depaepe, M. , Simon, F. , 2013, Crossing the atlantic to gain knowledge in the field of psycho-pedagogy: the 1922 mission of Ovide Decroly and Raymond Buyse to the usa and the travel diary of the latter, in P. Smeyers, M. Depaepe & E. Keiner (eds.), Educational research, Dordrecht, Springer, pp. 47-60.