LIR A: Crossover Intro. Secondary
Autor:Rogers, PaulLIR P: Crossover Plus 1. Secondary
Autor:Curwen, Hilda; Rogers, PaulLIR P: Crossover Plus 2. Secondary
Autor:Rogers, Paul; Curwen, HildaLIR: Crossover Plus 3. Secondary. Guía
Autor:Rogers, Paul; Curwen, HildaLIR: Crossover Plus 2. Secondary. Guía
Autor:Rogers, Paul; Curwen, HildaLIR: Crossover Plus 1. Secondary. Guía
Autor:Rogers, Paul; Curwen, Hilda