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Erisuuruisten ruokakuntien kulutustaso Engelin käyrien avulla mitattuna : summary: The consumption level of Finnish households of different sizes as estimated by means of Engel curves
Saramo, Kai, (1960)
Motivational factors in Bantu buying behaviour
Van der Reis, Alice Patricia, (1966)
Income and expenditure patterns of urban Bantu house- holds : Cape Town survey
Feldmann-Laschin, G. R., (1964)
Poverty and children : a study of family planning
Visuri, Elina, (1969)