1. ACSÁDI G Y., J. NÉMESKERI, 1970, History o f human life span and mortality, Akademia Kiado, Budapest
2. BLALOCK H.M., 1977, Statystyka dla socjologów, PWN, Warszawa
3. BOATLER J.F., 1983, Patterns of infant mortality in the Polish community of Chappell Hill, Texas, 1895-1944, Hum. Biol., 55, 9
4. BONGAARTS J., 1976, Intermediate fertility variables and marital fertility rates, Popul. Stud., 30, 327
5. BOROWSKI S., 1969, Demographic development and malthusian problem in the Polish territories under German rule 1807-1914, Studia Historiae Oeconomicae, 3, UAM, Poznań, 159