https://hdl.handle.net/1839/5ba8b71c-5b52-4600-94a0-5f2d814617d9
Tape recordings: short supplementary tape recordings, with transcriptions (ages in year; month (day) format; dates in US month-day-year format). Diary entries: 16 files of notes made between age 1;0(9) and age 16;11(24).