DOI: 10.1055/s-00000017

Experimental and Clinical Endocrinology & Diabetes

References

Heck KE, Schoendorf KC, Ventura SJ, Kiely JL.
Delayed childbearing by education level in the United States, 1969-1994. 
Matern Child Health J. 1: 81-88   1997; 

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