Keywords: dinosaurs nature exhibits smithsonian probably public domain probablypublicdomain indoor hall SI Neg. 86-3353. Date: 1986...Diplodocus, Dinosaur Hall, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) SI Neg. 86-3353. Date: 1986...Diplodocus, Dinosaur Hall, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) |