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National Speedway Directory
From the article:
" The measure of American racing's diversity is in the number of tracks, sanctioning bodies, and race series listed in the National Speedway Directory. The book lists no fewer than 1330 : 732 dirt and 227 paved ovals, 285 drag strips and 86 road courses across the US, plus another 145 in Canada: 46 dirt and 42 paved ovals, 41 drag strips, 16 road courses. The directory also lists 212 championships in the US and Canada. "
National Speedway Directory | The Source For Race Tracks
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