1835 D&C section 101, last edition while Joseph Smith was alive. The only major church that removed it was the LDS church. It states one man and one wife, to marry in public where everyone can see it, and that polygamy is a crime.
Joseph Smith modified journal entry.
Here are somethings I have written on the subject.
Articles from Alan Rock Waterman:
Some great book on the subject.
Other great resources: