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  1. Agate Studies I
  2. Solar System III
  3. Dandelion - Botanical Illustration
  4. Close-Up Royal Aztec Lace Agate
  5. Coral Reef
  6. Obama: Change
  7. Brain, artwork
  8. Normal spine, X-ray
  9. Plum Agate B
  10. Obama: Believe
  11. Be Whoo You Are
  12. Aquatic Collage
  13. Jabberwocky
  14. Cosmic Periodic Table
  15. Spatial dimensions, conceptual artwork
  16. College Graduation Ceremony
  17. No Man's Land - USGS Earth as Art
  18. The bones of the pelvis
  19. Microscopic view of bacteria
  20. Shame may be Fatal - WPA Poster
  21. Winston Churchill (1874-1965) in Naval Scene
  22. Sagenite On Mexican Agate
  23. Andes - USGS Earth as Art
  24. History Of Power
  25. The Presidents Educational Poster, 2017
  26. Alternating Motor - Blue
  27. Cartilage cells, TEM
  28. Geometry tools
  29. Graduated Cylinders And Flasks
  30. Puerto Rico - USGS State Mosaic
  31. Fun Facts about the U.S. Presidents
  32. Nebraska - USGS State Mosaic
  33. Tides as the Earth Turns
  34. Himalayas - USGS Earth as Art
  35. Star Collector I
  36. Ghostly Grease Ice - USGS Earth as Art
  37. The Optimist - USGS Earth as Art
  38. Dice on math game
  39. Alaska - USGS State Mosaic
  40. Yellowstone
  41. Portrait of Anton Chekhov (1860-1904) 1902
  42. Man using laptop computer
  43. Blood vessels and kidneys, artwork
  44. Palmtop
  45. Teachers III Blue
  46. Delaware - USGS State Mosaic
  47. Southern Star Chart
  48. Advertisement For E.S. Baker Young America Hams Breakfast Bacon, c1865