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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
Note that even though the publisher's copyright was not renewed, many of the stories and nonfiction pieces published in Dynamic Science Fiction had their copyrights renewed by their authors.
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copyright status
public domain
determination method or standard: copyright not renewed
inception
1952
data size
75,208 byte
height
561 pixel
width
400 pixel
media type
image/jpeg
checksum
ff117918d59e768212bfb4c06f9a1a835ccae32b
determination method or standard: SHA-1
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