$a Kp. a The analysis of engineering structures / by A. J. S. Pippard and J. F. Baker. - London, 1950.
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$a en.wikipedia, 15.05.18 $b (Alfred John Sutton Pippard, Alfred Pippard, 6 April 1891-2 November 1969) $u https://en.wikipedia.org/wiki/Alfred_Pippard
670
$a AIM25, 15.05.18 $b (Pippard, Alfred John Sutton, 1891-1969) $u http://www.aim25.ac.uk/cgi-bin/search2?coll_id=1802&inst_id=3