"Napalm in the Morning" Authorship

[Shapiro, Fred]

Can anyone point me to any information, on the web or in books or articles, concerning the division of labor between John Milius and Francis Ford Coppola in writing the screenplay for "Apocalypse Now"?  Specifically, is Milius or Coppola given credit for writing the "I love the smell of napalm in the morning" speech?

Fred Shapiro

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