Reconstruction talk:Proto-Germanic/herdō

The Proto-Indo-European word *kerdʰ- is said here to mean “file, row, herd”, but I'm trying to get a cited source for that here. There is no page yet in wiktionary for kerdʰ- and in seeking a source I only so far saw it was supposed to mean heart. VIOLENTRULER (talk) 08:02, 14 August 2015 (UTC)