TY - JOUR A1 - Schmidt Koenig, K. T1 - Current problems in bird orientation JF - D. S. Lehrman (Ed.), The study of behaviour, New York and London (Academic Press) 1965, pp. 217-278. Y1 - 1965 ER - TY - JOUR A1 - Schmidt, K. E. T1 - A Mental Health Center in an Underdeveloped Country JF - International Journal of Psychiatry, Boston, Vol. 1 (1965), pp. 208-218. Y1 - 1965 ER -