Sky Birds/Headquarters Detective
For most of uts life, this was an aviation pulp called Sky Birds,
but for a brief period in 1936/37 it became a detective pulp called Headquarters Detective.
| 1929 |
 v1 #1 Jan |
v1 #2 Feb |
v1 #3 Mar |
v1 #4 Apr |
v2 #1 May |
v2 #2 Jun |
v2 #3 Jul |
 v2 #4 Aug |
v3 #2 Sep/Oct |
v3 #3 Nov |
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| 1930 |
v3 #4 Jan |
v4 #1 Feb |
v4 #2 Mar |
v4 #3 Apr |
v4 #4 May |
v5 #1 Jun |
v5 #2 Jul |
v5 #3 Aug |
v5 #4 Sep |
v6 #1 Oct |
v6 #2 Nov |
v6 #3 Dec |
| 1931 |
 v6 #4 Jan |
v7 #1 Feb |
v7 #2 Mar |
v7 #3 Apr |
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v7 #4 Jun |
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v8 #1 Aug |
v8 #2 Sep |
v8 #3 Oct |
v8 #4 Nov |
v9 #1 Dec |
| 1932 |
v9 #2 Jan |
v9 #3 Feb |
v9 #4 Mar |
v10 #1 Apr |
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v10 #2 Jun |
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v10 #3 Aug |
v10 #4 Sep |
v11 #1 Oct |
v11 #2 Nov |
v11 #3 Dec |
| 1933 |
v11 #4 Jan |
v12 #1 Feb |
 v12 #2 Mar |
v12 #3 Apr |
 v12 #4 May/Jun |
v13 #1 Jul |
v13 #2 Aug |
v13 #3 Sep |
 v13 #4 Oct |
v14 #1 Nov |
 v14 #2 Dec |
| 1934 |
 v14 #3 Jan |
 v14 #4 Feb |
v15 #1 Mar |
 v15 #2 Apr |
 v15 #3 May |
 v15 #4 Jun |
v16 #1 Jul |
v16 #2 Aug |
 v16 #3 Sep |
 v16 #4 Oct |
 v17 #1 Nov |
 v17 #2 Dec |
| 1935 |
v17 #3 Jan |
v17 #4 Feb |
 v18 #1 Mar |
 v18 #2 Apr |
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 v18 #3 Jun |
 v18 #4 Jul |
v19 #1 Aug |
 v19 #2 Sep |
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 v19 #3 Dec |
| 1936 |
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 v19 #4 May |
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v20 #1 Jul |
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v20 #2 Sep |
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v20 #3 Nov |
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| 1937 |
v20 #4 Jan |
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 v21 #1 Mar |
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