IndCat

1	General theory of subject indexing languages
2	Studies of Popsi (Postulate Based Permuted Subject Indexing) in terms of its retrieval efficiency and economic efficiency
Language:	English
3	Optimum algorithm in subject indexing systems
4	Application of computer-based natural language processing tools and techniques in developing subject indexing languages
Language:	English
5	Postulate-based permuted subject indexing: A study of its effectiveness