57. ↑ "Graetz Flow Control Circuit". Archived from the original on 2013-11-04. ↑ Stutz, Michael (stutz@dsl.org), "Conventional versus electron flow", All About Circuits, Vol. 1, Chapter 1, 2000. ↑ Sears, Francis W., Mark W. Zemansky and Hugh D. Young, University Physics, Sixth Ed., Addison-Wesely Publishing Co., Inc., 1982, p.