The Purva Mimamsa Home Page: संकर्षकाण्ड (sankarsha kanda)

Usually ascribed to जैमिनि but some Vaishnava traditions consider it to have been written by काशकृत्स्न.

it is also known as देवताकाण्ड, मध्यमकाण्ड, or उपासनाकाण्द.

More information about it can be found at agnim.com.