00269nam a2200109Ia 4500008004100000040002500041082001600066100002200082245003500104260000900139300001100148230627s9999 xx 000 0 und d aNORSU-SiacNORSU-Sia a.658.83 C84 aCrimp , Margaret  4aThe marketing research process c1981 a256 p.