| Collection Descriptive Notes | Butzer lectures on his specialty, physical geography, apparently as part of his course given at The University of Chicago in Winter 1967. (It is not known why these two lectures came to the Language Lab or why there are only two of them.) |
| Collection Technical Notes | The tape for 17 January is missing but a digital copy survives; the tape for 9 February is in the DMA but it is not known whether it is the original live recording or a dub. The WAVE files are now converted to MP3s. |
| Contributor |