Regarding how distance methods are related, I suggest that
you get and read the "Phylogenetic Inference" chapter (pp. 407-
514) by Swofford et al. in Hillis, Morritz, and Mabel (Eds.)
Molecular Systematics, Sinauer, 1996. See especially pp.
444-462.
Hope this helps.
Doug Eernisse
CSU at Fullerton