There are two "Ash H-6030" recordings in existence. Apparently two different recordings of the same songs under the same label and catalog number. Note the two different labels.
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Ruth Rubin - Yiddish Songs of the Holocaust - Cassette
Paul Zim - We Shall Live Yiddish Songs of the Holocaust - K7 - Issue 1
Carl Nelkin - The Little Trees Are Weeping Songs Of The Holocaust And Resistance
Abraham Brun - Songs of the Ghetto
Songs Of The Vilna Ghetto