https://www.cartercenter.org/resources/pdfs/health/ephti/library/lecture_notes/med_lab_tech_students/ln_hematology_mlt_final.pdf https://www.austincc.edu/sziser/Biol%202404/2404LecNotes/2404LNExIV/i.Blood%20&Hematology.pdf https://www.hematology.org/-/media/files/ntc_hematology_may_1_2013.pdf https://eclinpath.com/hematology/tests/hematocrit/ . .