Gade pasaj ki anba a epi reponn kesyon an apre nan menm lang ak pasaj la:  Passage: Songs of the Humpback Whale (SWR 118) te orijinal lage nan 1970 pa CRM Records soti nan anrejistreman ki fèt pa Roger Payne, Frank Watlington, ak lòt moun. LP a te pita re-released pa Capitol Records, pibliye nan yon fòma fleksib nan National Geographic Society magazin, volim 155, Nimewo 1, nan mwa janvye 1979, re-released pa k ap viv Mizik / Windham Hill / BMG Records sou CD nan 1992, ak remastered sou CD pa BGO-Beat ale sou nan 2001.  Kesyon: Ki non konpayi anrejistreman ki lage SWR 118?
Dosye CRM