Journal of the Arizona Academy of Science.

Scientific American.

Comparative studies in society and history.

Comparative studies in society and history.

Available for UP System via Cambridge Core.

Comparative studies in society and history.

Available for University of the Philippines - Diliman via ProQuest. Click here to access

Political research, organization and design PROD.

Current research and development in scientific documentation, no. 1.

Proceedings of the indiana academy of science

New statesman.

Midwest journal of political science.

Available for University of the Philippines - Diliman via JSTOR. Click here to access