51. Boulder, Colo Yale Public content 1960. 2011-12-12T21:24:23Z. 2022-03-29T20:39:06Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Colorado.
52. Bouquet Reservoir, Calif Yale Public content 1960. 2011-12-12T21:22:28Z. 2022-03-29T20:38:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. California.
53. Boylston, Wash Yale Public content 1960. 2011-12-12T21:39:16Z. 2022-03-29T20:40:53Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Washington.
54. Bradfield Canal (A-3) quadrangle, Alaska : 1:63 360 series (topographic). Yale Public content 1960. 2012-09-28T15:16:25Z. 2022-03-29T20:37:25Z. Geological Survey (U.S.). Interior-Geological Survey. English. cartographic image. Public. Alaska.
55. Bragança. 7-B. Yale Public content 1960. 2013-01-11T21:28:25Z. 2022-03-29T20:38:19Z. Instituto Geográfico e Cadastral (Portugal). Instituto Geográfico e Cadastral. Portuguese. cartographic image. Public. Portugal.
56. Brandon, west of principal meridian, Manitoba : bedrock geology and principal aquifers Yale Public content 1960. 2012-10-09T14:01:55Z. 2013-03-18T22:22:31Z. Geological Survey of Canada. Geological Survey of Canada. English. cartographic image. Public. Manitoba and Brandon Region.
57. Bridgeport, Calif.- Nev Yale Public content 1960. 2011-12-12T21:22:30Z. 2022-03-29T20:38:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. California and Nevada.
58. Bridgeport quadrangle : Connecticut - Fairfield Co. Yale Public content 1960. 2012-11-16T14:00:48Z. 2013-03-18T20:44:55Z. Geological Survey (U.S.). Geological Survey. English. cartographic image. Public. Bridgeport (Conn.) and Fairfield County (Conn.).
59. Brinkley, Ark Yale Public content 1960. 2011-12-12T21:22:04Z. 2022-03-29T20:38:49Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Arkansas.
60. Broken Bow, Okla Yale Public content 1960. 2011-12-12T21:35:06Z. 2022-03-29T20:40:26Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Oklahoma.