- 1. Frog (Rana), testis t.s. showing spermatogenesis Lieder_4493d
- 2. Frog (Rana) embryology: four cell stage t.s. Lieder_4494f
- 3. Frog (Rana) embryology: morula stage l.s. Lieder_4495f
- 4. Frog (Rana) embryology: neurula stage t.s. Lieder_4496f
- 5. Komplet - The Frog (Rana), 20 mikro. preparatov Lieder_5900