TY  - RPRT
TI  - [Allowable duration for using intrauterine polyethylene contraceptives].
AU  - Iu A Petrov
AU  - E A Kovaleva
AU  - T A Petrova
PY  - 1986
UR  - https://pubmed.ncbi.nlm.nih.gov/2945459/
ID  - 2945459
ER  -