Hubert Humphrey visits LBJ; Lady Bird to dentist; Lady Bird describes facets of LBJ's personality; Lady Bird swims laps; renovations to outside of White House; Lady Bird describes trees along streets; Highway Beautification Bill; Clark Clifford & LBJ discuss foreign aid, UN and Ambassador Goldberg; Sargent Shriver visits LBJ; Lady Bird discusses gardening and park maintenance Job Corps courses; Dean Rusk brings good wishes from Soviet Union