Burstall, Francis E. and Rawnsley, John Y. <br/><br/>
Twistor theory for Riemannian symmetric spaces with applications to harmonic maps of Riemann surface   

 - Berlin  Springer-Verlag  1990 
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 - Lecture notes in Mathematics   1424 .
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<br/><br/><label>Dewey Class. No.: </label>530.1  / B972.TT