[.:4:.]

This a my in general hot tip. When it comes to Australian standards they're not cheap. However, if you know a person enrolled at TAFE, they can take a usb stick to the library and download any standard they like for free. Regardless of what course they are doing. There is a 3 day expiry on the pdf. So within that 3 days, take the usb to officeworks get it printed doublesided and bound and it'll save a fortune.