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Born on January 30, 1942 (age 81 years), Jakarta

Soerjono Soekanto is the Head Lector of Sociology and Customary Law at the Faculty of Law, University of Indonesia. Soerjono Soekanto was once the Head of the Curriculum Section of the National Defense Institute (1965-1969).

Soerjono Soekanto explained that qualitative methods in sociological research

According to Soerjono, sociology is a science that focuses on the general aspect of society and tries to get general patterns of people's lives.

And according to Soerjono Soekanto, social problems are a mismatch between elements of culture or society, which endanger the lives of social groups.

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- Joseph Roucek
Joseph S. Roucek (1902-1984) was born in Prague, Czechoslovakia. in death place, New York.

A political theorist and author. He wrote and co-authored several books on education and politics. Including the Czechs and Slovaks in America. Behind the iron curtain, America’s Ethnic Politics and show learner.

Theories and Contribution.
Roucek and warren found that Sosiologi is a knowledge that learns/study about a connection between humans and groups.

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-Kenneth c.w kammeyer
currently Professor Emeritus at the University of Maryland, College Park, where he has chaired the Sociology Department

Born on October 26, 1931
currently 91 years old

He puts forward sociology is a systematic study of individual social behavior, the work of social groups, organizations, cultures, societies, the influence of social groups, and society on the behavior of individuals and groups.