Electronic reproduction. [Place of publication not identified] : HathiTrust Digital Library, 2011.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212
Official journal of: the National Perinatal Association, <June 1989>- ; the Section on Perinatal Pediatrics, American Academy of Pediatrics, Apr./May 1999-
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V. 39, no. 8 (Aug. 2019) (Nature Publishing Group website, viewed Aug. 26, 2019).