improper

Sources

• NASH 1968 258 (unsuitable)

  NASH, Rose. (1968) Multilingual Lexicon of Linguistics and Philology: English, Russian, German, French. Coral Gables, FL: University of Miami Press. 

• HARTMANN & STORK 1972 108 (improper compound, improper speech)

  HARTMANN, R.R.K. & STORK, F.C. (1972) Dictionary of Language and Linguistics. London: Applied Science Publishers.

• HAMP 1963 32 (improper speech-forms)

  HAMP, Eric P. (1963) A Glossary of American Technical Linguistic Usage 1925-1950. Utrecht: Spectrum Publishers. 

• PEI & GAYNOR 1954 97 (improper compound, improper triphthong)

  PEI, Mario A. & GAYNOR, Frank. (1954) A Dictionary of Linguistics. New York : Philosophical Library.