Keywords: dinosaurs nature exhibits smithsonian probably public domain probablypublicdomain SI Neg. 77-7332. Date: 1977...Pteranadon, Dinosaur Hall, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) SI Neg. 77-7332. Date: 1977...Pteranadon, Dinosaur Hall, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) |