1.6.2 Fastest, cheapest and best cobblestone generator! - Redstone Creations - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
How to Create an Automatic Cobblestone Generator in Minecraft 1.5.0 : 20 Steps - Instructables
How to Make a Cobblestone Generator in Minecraft : 4 Steps - Instructables