Earl W. Stevick, Adapting and Writing Language Lessons… (1971)
“ With the growing shortage of time and money for writing new textbooks, particularly in the seldom-taught languages, there is a premium on making effective use of what already exists. We have sometimes acted as though, for any given set of materials the choice was only between using them and rejecting them. Adaptation, as a third alternative, has received very little either of time or of money or of prestige. ”
