@Book{463699831,
author="Schrader, Achim",
title="Introdu{\c{c}}{\~a}o {\`a} pesquisa social emp{\'{\i}}rica: um guia para o planejamento, a execu{\c{c}}{\~a}o e a avalla{\c{c}}{\~a}o de projetos de pesquisa n{\~a}o-experimentais",
year="1978",
edition="2. ed",
publisher="Ed. Globo",
address="Porto Alegre",
note="Achim Schrader. Com a colab. de Magdalene Malwitz-Sch{\"u}tte e J{\"u}rgen Sell. Trad. de Manfredo Berger",
language="Portuguese"
}