I ordered this from NTIS - The National Technical Information Service. The exact title is:
History of the Army Ground Forces. Study Number 22. The Amphibious Training Center
It was written in 1946 by Capt. Marshall O. Becker
I've just begun skimming it and I am very pleased. I've never seen any similar to it and it covers with illustrations, background on amphibious operations, activation and mission, organization, training at Camp Edwards and Camp Gordon Johnston and an epilogue. Good stuff. 
It will come in handy for my documentary, and I'm also planning on copying it for the website in the near future.
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company
The document index and full text is online, but it does not have the photos/ illustrations.
The Army Ground Forces THE AMPHIBIOUS TRAINING CENTER Study No. 22
Larry
"I'm proud to be an American, Where at least I know I'm free
And I won't forget the men who died, Who gave that right to me."
God bless the USA - Lee Greenwood
Danka, Larry. Now I don't have to copy everything myself. I can just post the photos.
I did post part of them this morning under another related post just today.
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company