@misc{indiciae966e64f42839, title = {Vasectomy in Colombia: a pilot study.}, author = {A Goldsmith and G Echeverria and R Goldberg}, year = {1973}, doi = {10.1017/s0021932000009366}, url = {https://pubmed.ncbi.nlm.nih.gov/4754835/}, note = {Source identifier: 4754835} }