1. 2012-07-27 [racket] Typed Racket - More Poly Type Checking racket-us Ray Racine 2. 2012-07-27 [racket] Typed Racket - More Poly Type Checking racket-us Sam Tobin-Hochstad 3. 2012-07-21 [racket] Typed Racket - More Poly Type Checking racket-us Ray Racine