D. Reidel Pub. Co., 1987
451 pages ISBN# 1-55608-046-8(hard cover) 1-55608-047-6(paperback)
This book includes many of the classic articles relevant to the question of whether or not natural language syntax can be described by context-free grammar.
Be warned that, due to some production problems, the quality of the copyediting in the introductory sections is very poor. But, the material is all readable and the articles themselves have all been copyedited.