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.

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