TY  - RPRT
TI  - Obtaining access to data sources: an exploration of method, problems and possible solutions.
AU  - D F Cormack
PY  - 1980
DO  - 10.1111/j.1365-2648.1980.tb00976.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6902729/
ID  - 6902729
ER  -