Experiments in extension programs presented at the Thrity-second Annual Meeting, January 13-16, 1953.
| 団体著者: | |
|---|---|
| フォーマット: | 図書 |
| 言語: | English |
| 出版事項: |
Washington, D.C.
Highway Research Board
1953.
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| シリーズ: | Highway Research Board
Bulletin 85. |
| 主題: |