AT-1191
Longyou Caves / Huashan Grottoes
Why Ancient Inquiry uses this citation here
Li and colleagues' engineering-geology study of argillaceous siltstone, clay interlayers, trial adits, and cavern siting; supports empirical human geological planning without implying lost machinery.
What this usage does not establish
Bibliographic verification does not by itself establish that the full text was read.
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