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(1963). HINTERLAND DELIMITATION: A DISTANCE MINIMIZING APPROACH. The Professional Geographer: Vol. 15, No. 6, pp. 7-10.
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Stored only when both papers are in the corpus — 77 citations exist upstream.
Papers that cite the same references — the relational fallback while embeddings are still backfilling.
Imported from OpenAlex (CC0) — nothing here is generated.