The Open University. Assignments in technical english : assignment DAM / The Open University ; prepared by the English Language Teaching Development Unit

Assignments in technical english : assignment DAM / The Open University ; prepared by the English Language Teaching Development Unit . - Essex : The Open University Press, cop. 1974 . - 2 v. 30 cm . - (The crisis series) . -
vol.1 : Students workbook. - 14 p. + 4 f. em bolsavol.2 : Teacher's handbook. - [92] p. + 5 f. em bolsa