Epstein, T. Scarlett A Training manual for development market research (DMR) investigators / by T. Scarlett Epstein, JAnet Gruber, Graham Mytton. - London : BBC World Service, c1991. - ix, 76p. : ill. ; 21 cm. Bibliography : p. 72. Glossary : p. 73 - 76. Subjects--Topical Terms: Marketing research.Development market research. LC Class. No.: HF5415.3 / Ep8 1991