Davidson, W. Harold (William Harold), d.1958.

http://www.worldcat.org/oclc/270527813

http://www.worldcat.org/oclc/270529313

http://www.worldcat.org/oclc/270525809

http://www.worldcat.org/oclc/270525915

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http://www.worldcat.org/oclc/270527490

http://www.worldcat.org/oclc/270526644

http://www.worldcat.org/oclc/270532578

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http://www.worldcat.org/oclc/270525501

http://www.worldcat.org/oclc/270526780

http://www.worldcat.org/oclc/780365575

http://www.worldcat.org/oclc/270526335

http://www.worldcat.org/oclc/270525920

http://www.worldcat.org/oclc/270528984

http://www.worldcat.org/oclc/270526510

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http://www.worldcat.org/oclc/270527632

http://www.worldcat.org/oclc/270526983

http://www.worldcat.org/oclc/270526217

http://www.worldcat.org/oclc/270527374