Astronautix.com, Apollo 13: The S-IVB/IU impacted the lunar surface at 8:10 p.m. EST on April 14 at a speed of 259 meters per second (incorrect, should probably be 2590 meters/sec), […] 137.1 kilometers from the Apollo 12 seismometer.
"JAXA Press Release (PDF)"(PDF) (dalam bahasa Japanese). JAXA. 2009-02-18. Diakses tanggal 2009-02-20.Pemeliharaan CS1: Bahasa yang tidak diketahui (link)