Most compact cobblestone generator I could come up with. : r/PewdiepieSubmissions
Tutorials/Cobblestone farming – Minecraft Wiki
Smallest Cobblestone Generator I've made. - Album on Imgur
Combined Stone/Cobblestone Generator Using Waterlogged Trapdoor : r/Minecraft
TIL: Waterlogged blocks can be used in cobblestone generators : r/Minecraft
Most Efficient Cobblestone Generator! Minecraft Map
1.6.2 Fastest, cheapest and best cobblestone generator! - Redstone Creations - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Tutorials/Cobblestone farming – Minecraft Wiki
Cobblestone Generator (Tiny Progressions) - Official Feed The Beast Wiki