Volume 30 - The Wailing Siren Mystery - Major Format Types
| # | Years | Text | Cover | Spine | Art | EPs
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| A | 1951 | Original | Brown | Wrap | Gillies | Orange Gretta
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| B | 1952-58 | | Tan | | |
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| C | 1959-62 | | | | | Brown multi scene
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| D | 1962-68 | | PC | Blue | |
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| E | 1968-79 | revised | | | Nappi | White multi scene
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| F | 1979-87 | | | | | Cameo
|
| G | 1987-Date | | Flashlight PC | | | Blank
| Major Variants
1959 - off-center cut, dark brown multi scene endpapers
1968 - author name missing from spine
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All Editions For Sale
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