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21
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22
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23
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24Published 1987“...HQ 1180 .P178 1987...”
Book -
25
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26by Poole, Bertram W. H. (Bertram William Henry), b. 1880“...HE 6185 .C7 .P822 1912...”
Published 1912
Book -
27
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28
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29
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30Published 1950“...HE 6191 .C229 1950...”
Conference Proceeding Book -
31Published 2010“...HJ 5503.5 .K62 2010...”
Book -
32Published 1959“...HA 3039 .N532...”
Book -
33