I've checked the page numbering again, and the fold out pages are numbered correctly - two numbers per sheet. However, there still seems to be a missing page. The fold-out page with the schematic diagram is numbered 23-24. The next page, "Reference Voltage and Waveform at Each IC Pin", is numbered 27. So, 25 & 26 appear to be missing.
Anyone have an original to check against the scanned copy?