10 words in 1971

It's a great quote, isn't it? But where does it come from? I recently found out about its origin and was surprised to find it dates back to the early 1970s, ironically when the use of ‘whole word/whole language strategies’ and outrageous fashions were at their peak here in the UK. The author was actually using it as an example when he was writing about the power of direct instruction, so it perhaps slipped under the radar of those who focused on children’s reading. I may be b