The role of language in problem solving 1 : edited proceedings of the Symposium held at The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, 29-31 October, 1984 / editors: Robert Jernigan, Bruce W. Hamill and David M. Weintraub. - Hamill, Bruce W.; Jernigan, Robert; Weintraub, David M. (North-Holland, 1985)