Where can I find a particular U.S. military training manual?

The manual I'm looking for is about L.I.N.E (Linear Infighting Neural Override) Combatives. It was created in 1977 for the USMC, so a manual around that time, or until about 1991 when another fighting system took its place should work. I just need to find something "official" about this kind of combat- not an interview or third person commentary etc. If you do not have helpful links or information that will help me get the manual, please refrain from commenting at all and wasting everyone's time. Thank you in advance!