i had the original green book with yellow lettering on it years ago when i was working with deaf people and people with other physical and mental problems from the book i learnt to communicate with those i worked with and they even pointed out to me that some of it was wrong i learnt from those that use auslan as much as from the book it;s self.
I no longer work in that place anymore but sometimes if i bump into them shopping or down the street u still know that to say " Hi,or hello" is extending the right middle and index finger straight with the thumb and little and ring finger tucked in then flip the hand over to palm up.
That's what i learn from the book years ago,that and much more,i sometimes use it to talk to others still and now that i have a hearing problem myself im glad i learnt it and will be ordering the newer released book to stay up to date