MRH refers to HM.
Milton R. Hunter, Pearl of Great Price Commentary (Salt Lake City: Bookcraft, 1951), 104
Thus males were created in the image and likeness of God the Eternal Father while the females were formed in the image and likeness of God their Eternal Mother. In other words, all the men and women who have ever lived on this earth or who ever shall live here are literally sons and daughters of Heavenly Parents.