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3.6. Summary

High-redshift sources identified at nonoptical/near-infrared wavelengths therefore provide an important, albeit skewed, view of galaxy formation, typically selecting unusual sources with powerful active nuclei or systems undergoing massive bursts of star formation. Recently several optical/near-infrared techniques have proved successful at isolating the "normal" population of distant galaxies. We discuss these methods below. In Section 6 we discuss the biases inherent in the various selection techniques, detailing how populations identified at differing wavelengths compare.