P087
Peggy Study, Panel P087 Themes: Language Development, Object Exploration, Reading Source: (Lawler); date: 9/24/1979 Title: Text commentary: These clips show language tests; introduction of conical post to Ring Tower; P87A1 Objects, Sound, Light, 18mb P87A2 Grammar Test, 15mb P87B Ring Tower, Cone Replacing Rod, 13mb P87C1 Standard Objects, 20mb P87C2 Standard Objects, 21mb P87C3 Standard …