IV which chandler?

[umberto rossi]

I've already read messages which highlighted the connections 
between IV and Chandler, but which Chandler? Somebody said 
Pynchon took something from several Chandler novels, but surely the 
main plot is closer to The Big Sleep, where Terence "Rusty" Regan is 
missing; in P. Mickey Wolfmann is missing, and Mickey sounds 
rather Irish to me (though the surname is German, especially with 
the double n spelling that--somebody says in the novel--Mickey 
always insisted on). Being beyond page 200 (well beyond) it won't 
take me much to check if the ending is also similar... (now that I 
think of it, the missing man theme is also present in The Long 
Goodbye...).
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umberto rossi