00597nam a22002177a 4500 20250519132321.0 250519b |||||||| |||| 00| 0 eng d DO Inside the great white April 2000 Vol. 197 No. 4 National Geographic Great White Sharks, Yemen, Chiquibul Cave, Update From the Field, San Pedro River, Nature's Rx, Duck-Billed Platypus SHARKS YEMEN CHIQUIBUL EXPLORATION RIVER NATURE PLATYPUS ddc CR 5533 5533 DO DO DSMSR042000-051