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|BM||100.662 (May 1958): 174-178||http://www.jstor.org/stable/872431|
|RN||10.2 (Summer 1957): 103-105||http://www.jstor.org/stable/2857511|
|AMSC||26.2 (Spring 1957): 250||http://www.jstor.org/stable/41208260|
|CAJ||18.2 (Winter 1959): 184-187||http://www.jstor.org/stable/774199|
|ZfK||21.3 (1958): 271-274||http://www.jstor.org/stable/1481289|
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