Pre-1978, no mark. The newspaper has no copyright marks referring to the paper on any of its 17 pages; the publisher's information on the second page has only who published it, the LA address and the prices for a subscription. The photo uploaded is a better quality copy of the one seen in the newspaper.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
{{Information |Description=Photo of The Chiffons after they became a 4-girl group. |Source=[http://krlabeat.sakionline.net/issue/25june66.pdf KRLA Beat] page 10 |Date=June 25, 1966 |Author=KRLA/Beat Publications-page 2 |Permission=Pre-1978, no mark |ot...
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