المؤلفون: Kari, F., Kvitting, J. E., Liang, D. H., Stephens, E. H., Merk, D. R., Mitchell, R. S., Fischbein, M. P., Miller, D. C.

المصدر: Interactive CardioVascular and Thoracic Surgery ; volume 17, issue suppl 2, page S87-S87 ; ISSN 1569-9293 1569-9285

الاتاحة: https://doi.org/10.1093/icvts/ivt372.75
http://academic.oup.com/icvts/article-pdf/17/suppl_2/S87/1949010/ivt372.75.pdf

المؤلفون: Stephens, E H

المصدر: New Zealand journal of agriculture, 15 Mar 1943; v.66 n.3:p.159-160

المؤلفون: Stephens, E H

المصدر: New Zealand journal of agriculture, 15 Jun 1946; v.72 n.6:p.600

المؤلفون: Stephens, E H, Gill, Dudley A

المصدر: New Zealand journal of agriculture, 20 Jan 1937; v.54 n.1:p.1-7

المؤلفون: CLARE, N. T., STEPHENS, E. H.

المصدر: Nature ; volume 153, issue 3878, page 252-253 ; ISSN 0028-0836 1476-4687

الاتاحة: http://dx.doi.org/10.1038/153252b0
http://www.nature.com/articles/153252b0.pdf
http://www.nature.com/articles/153252b0