(1950). Institute of Child Welfare, University of Minnesota, Minneapolis 14, Minnesota. The Journal of Psychology: Vol. 30, No. 1, pp. 199-227.
David E.R. SutherlandF. C. GoetzKay C. MoudryJ. S. Nagarian
North American Vexillological Association / Association nord-américaine de vexillologie
GREGORY M. VERCELLO HIThomas B. MackenzieIlene Harris