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Laboratory Examinations and DiagnosesLaboratory ProceduresFamily PlanningAntifertility AgentsContraceptive AgentsTLC SeparationArtificial InseminationETHINYL ESTRADIOLOral ContraceptiveControl AgentsSex DeterminationBull SpermScale TestMass SpectrometryHuman PlasmaEthinyloestradiolN-arylContraceptionSPERMMethoxy
vol.290 (1978)
vol.285 (1977)
vol.4 (1968)