1. Affirmation of the vocation director;Billotta;Call to Growth Ministry,1982, Spring
2. Constancy of interest factor patterns within a specific vocation of foreign missioner;D'Arcy;Studies in Psychology and Psychiatry,1954
3. Personal patterns among religious personnel: A review;Dunn;Catholic Psychological Record,1965
4. The use of multiple measurements in toxonomic problems;Fisher;Annals of Eugenics,1936