3V1543.1
3V1543.01 Peggy is ready for liquid conservation test: pouring soda, she observed that her glass is taller than Robby’s; no detail (4/14/82)
Week 220, from birth
3V1543.01 Peggy is ready for liquid conservation test: pouring soda, she observed that her glass is taller than Robby’s; no detail (4/14/82)
3V1541.01 Using object impermanence: Miriam and Peggy going around me — hiding by my obstructing Katy’s line of sight — as a game all delighted in: THEME: the Permanent person precedes the permanent object;.no detail (4/12/82) no more detail.