molded concrete unit
51National Monument (Indonesia) — Coordinates: 6°10′31.45″S 106°49′37.61″E / 6.1754028°S 106.8271139°E / 6.1754028; 106.8271139 Mon …
52Nutrient cycle — …
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51National Monument (Indonesia) — Coordinates: 6°10′31.45″S 106°49′37.61″E / 6.1754028°S 106.8271139°E / 6.1754028; 106.8271139 Mon …
52Nutrient cycle — …