TY - BOOK AU - LANGBEIN, Laura I. AU - LICHTMAN, Allan J. TI - Ecological inference T2 - (SAGE University Papers. Quantitative Applications in the Social Sciences; 10) SN - 0803909411 PY - 1986/// CY - London [etc.] PB - SAGE Publications KW - Anàlisi KW - Mètodes KW - Ciències socials KW - ECOLOGÍA KW - ECOLOGY KW - MÉTODOS DE ANÁLISIS KW - METHODS OF ANALYSIS KW - MANUAL KW - HANDBOOK ER -