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16 of the second paragraph of the text should be changed to read ". ..total bond charge in the Ge-As and Ge-Ga bonds is 2.23 and 1.77 electrons, respectively. Thus. ... " These corrected results are very close to the predictions of the "simple chem- ical arguments" mentioned earlier in the para- graph. We thank J. Ihm for bringing this error to our attention.
Pickett et al. (Mon,) studied this question.