Keywords: dinosaurs nature exhibits smithsonian probably public domain probablypublicdomain outdoor SI Neg. 77-9347. Date: 1977...Triassic Mural, Dinosaur Hall, National Museum of Natural History ..Credit: Alfred F. Harrell (Smithsonian Institution) SI Neg. 77-9347. Date: 1977...Triassic Mural, Dinosaur Hall, National Museum of Natural History ..Credit: Alfred F. Harrell (Smithsonian Institution) |