Cognitive Perspectives of Information Retrieval Interaction: Elements of a Cognitive IR Theory

@article{Ingwersen1996CognitivePO,
  title={Cognitive Perspectives of Information Retrieval Interaction: Elements of a Cognitive IR Theory},
  author={Peter Ingwersen},
  journal={Journal of Documentation},
  year={1996},
  volume={52},
  pages={3-50}
}
full text) and the cognitively different indexer interpretations of the 
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