41. Alikchi quadrangle, Indian Territory (Choctaw Nation)

42. Amargosa region, Nevada California

43. The American Atlas [Material cartográfico] : or, A Geographical Description of the Whole Continent of America, wherein are delineated at large, its several regions, countries, states, and islands; and chiefly the British Colonies, Composed from numerous Surveys, several of which were made by Order of Government

44. Amérique Méridionale [Material cartográfico] Publiée sous les Auspices de Monseigneur le Duc d'Orléans Prémier Prince du Sang

45. Amérique Septentrionale [Material cartográfico] : Publiée sous les Auspices de Monseigneur le Duc d'Orleans Prémier Prince du Sang

46. Amsterdam quadrangle, New York

47. Anaheim quadrangle, California

48. Anaheim Sheet, California

49. Ancient India [Material cartográfico]

50. Angelica quadrangle, New York

51. Ann Arbor quadrangle, Michigan

52. Annapolis quadrangle, Maryland

53. Anne Arundel quadrangle, Maryland

54. Anniston quadrangle, Alabama

55. Anoka quadrangle, Minnesota

56. Anson quadrangle, Maine (Somerset county)

57. Antlers quadrangle, Indian Territory (Chickasaw Nation)

58. Apalachin quadrangle, New York

59. Apishapa quadrangle, Colorado

60. Ardmore quadrangle, Indian Territory (Chickasaw Nation)