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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1992.</dim:field>
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   <dim:field mdschema="dc" element="title" lang="en_US">Development and functions of signature whistles of free-ranging bottlenose dolphins, Tursiops truncatus</dim:field>
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