TY  - RPRT
TI  - Information retrieval for teaching files: a preliminary study.
AU  - J M Bramble
AU  - M F Insana
AU  - S J Dwyer
PY  - 1990
DO  - 10.1007/bf03167602
UR  - https://pubmed.ncbi.nlm.nih.gov/2085550/
ID  - 2085550
ER  -