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   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">1973</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1973.</dim:field>
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   	&lt;Title>Experimental investigation of vortex rings and helicopter rotor wakes using a laser Doppler velocimeter,&lt;/Title>
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