From the catalogue at the site (UTK Library):
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Author: Karpeles, Maud. ed.
Title: Folk songs of Europe, edited for the International Folk Music Council. Prepared under the auspices of the International Music Council, with the assistance of the United Nations Educational, Scientific & Cultural Organisation (UNESCO)
Imprint: New York, Oak Publications [1964]
Call Number: M1698.K37F6 1964
Description: xx, 268 p. 22 cm.
Subject: Folk-songs, European.
Notes: "Original edition ... 1956 ... Novello ... England" Unacc., with chord symbols; words in original languages and English.
Bibliography: "Sources of the songs": p. xii-xvi.
Series: International folk song anthologies
Other Authors: International Folk Music Council.
Holdings: Music Lib stacks M1698.K37F6 1964 checked in
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I have the anthology (Oak edition), but cannot find it at present.

~Masato