Selected References to Sydney Lamb and his Work
David Lockwood, An Introduction to Stratificational Linguistics. Harcourt Brace Jovanovitch, 1972.
David Lockwood, Peter Fries & James Copeland (eds.), Functional Approaches to Language, Culture, and Cognition: Papers in Honor of Sydney M. Lamb. John Benjamins, 2000.
Rüdiger Schreyer, Stratifikationsgrammatik, Eine Einführung. Niemayer, 1977.
Encyclopedia Brittanica: Stratificational Grammar (under Linguistics)
The Cambridge Encyclopedia of Language.
International Encyclopedia of Linguistics (Oxford): Stratificational Grammar
The Linguistics Encyclopedia (London and New York: Routledge, Second Edition, 2002): Stratificational Linguistics.
E.F.K. Koerner and R.E. Asher (eds.), Concise History of the Language Sciences (Pergamon, 1995): Stratificational Grammar (D.C. Bennett).
Who's Who in America.
Wikipedia
Encyclopedia Britannica online