TY - GEN AU - World Health Organization TI - WHO laboratory manual for the examination of human semen and sperm-cervical mucus interaction SN - 0-521-64599-9 AV - 4th ed. PY - 1999/// CY - Cambridge : PB - Cambridge University Press KW - Semen KW - Chemistry KW - Laboratory manualsvLaboratory manuals KW - Spermatozoa KW - Laboratory manuals KW - Sperm-ovum interactions N1 - Prepared by the WHO Special Programme of Research, Development and Research Training in Human Reproduction. ; Published on behalf of the World Health Organization by Cambridge University Press ER -