Summers, Della.

Longman dictionary of contemporary English / by: Summers, Della. (Language materials, printed)

Longman dictionary of contemporary English / by: Summers, Della. (Language materials, printed)

Longman language activator : = the world's first production dictionary / by: Summers, Della.; Rundell, Michael.; Ham, Nick.; Gillard, Patrick.; Jackson, Ted. (Language materials, printed)

Longman Exams Dictionary / by: Summers, Della. (Language materials, printed)

Longman dictionary of contemporary English : = [the living dictionary] / by: Summers, Della. (Language materials, printed)

Longman dictionary of English language and culture / by: Summers, Della.; English-speaking countries (Language materials, printed)