Bertrand, J. T., & Seiber, E. E. Contraceptive dynamics in Guatemala: 1978 - 1998.
Cita Chicago Style (17a ed.)Bertrand, Jane T., y Eric Escudero Seiber. Contraceptive Dynamics in Guatemala: 1978 - 1998.
Cita MLA (9a ed.)Bertrand, Jane T., y Eric Escudero Seiber. Contraceptive Dynamics in Guatemala: 1978 - 1998.
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