00428ctm a2200133u  450000500170000000600010001700700030001800800410002102000150006210000230007724501150010026000520021530000270026720250312110832.0ta240619suuuuuuuu              001|0 eng u  cETB 400.001 aRobsan Margo Egne.10aResearch principles and practices :h[manuscript] :bA Complete Guide for Researchers /cby Robsan Margo Egne.  aAddis Ababab :bSolar Printing Presss,cc 2022.  aviii, 255 p. ;c25 cm.