Prohibition against contracting this impurity, for a Kohen and for a non-Kohen: Rosh HaShanah 16b
Parts of the body might be considered connected to the body as far as laws of kashrut but not as far as impurity: Beitzah 7a
Whether tumat neveilah applies for a koy: Keritot 21a
Forms of Impurity
This type of impurity is considered 'tumah chamurah' - heavy impurity - because it can communicate impurity to someone who carries it: Keritot 20b
Impurity for an animal which was a tereifah when it was slaughtered: Shabbat 136a; Zevachim 50b-51a
Impurity for a bird which was a tereifah when it underwent melikah: Shabbat 136a; Zevachim 50b-51a
Impurity for an animal which was slaughtered before reaching the 8 day viability mark: Shabbat 136a
Impurity for an animal which was killed [rather than natural death] before it could reach the 8 day mark: Shabbat 136a
Impurity for a corpse after it has been ingested by a dog and the dog has died: Shabbat 155b
Atop a large rock atop pegs atop the item [Even Masma]: Shabbat 82b-83a
Impurity for blood of a corpse: Shabbat 77a; Keritot 21a
Eggs from [partially] inside the corpse of a kosher bird: Menachot 70a
Eggs anchored in the corpse of a kosher bird: Beitzah 7a
Different parts of the corpse of a kosher bird: Beitzah 7a
Meat taken from a live kosher bird: Beitzah 7a
An animal's soft hide: Zevachim 28a