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No open-access location is known for this record yet.
A proposed model of the use of public library lending bookstocks, and a programme of data collection to establish the key parameters.
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Stored only when both papers are in the corpus — 2 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.