Logo Sessions: 27-28: TIS Video #25 Theme: Concrete Iteration Source: (Lawler); date: 6/25/1977 Please enable JavaScript LinkEmbedCopy and paste this HTML code into your webpage to embed. Varying Angles 34mb Please enable JavaScript LinkEmbedCopy and paste this HTML code into your webpage to embed. Concrete Iteration 29mb Please enable JavaScript LinkEmbedCopy and paste this HTML code into your webpage to embed. Changing Concrete Procedures 15mb