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Symposium on Population Pressures upon Physical and Social Resources in the Developing Lands, Pennsylvania State University 1967
An abridged version of the discussions [at the symposium] held September 18-23, 1967, at the Pennsylvania State University, University Park, Pennsylvania
Geography and a crowding world
![An abridged version of the discussions [at the symposium] held September 18-23, 1967, at the Pennsylvania State University, University Park, Pennsylvania](https://s3.amazonaws.com/readfeedstatic/book_covers/thumbnails/rf-placeholder.png)