61. A particularly interesting feature of the trestle piers was the method used for founding them on irregular river beds.
62. A perfect circle then forms within which a powerful geometric shape used in worship appears.
63. A perfect match my sister used to say.
64. A pleasing publication which shows the diversity of military and civil aircraft and airlines that have used this airport.
65. A plethora of books of topographical views at home and abroad used steel engravings, many of them of poor quality.
66. A primer is used to teach a non-reading native speaker of a language to read his own language.
67. A pulley block was used to ensure the safety of this manoeuvre.