@conference {39725,
	title = {The repeatability of ultrasonic fat-depth measurements made on sheep up to 18 months of age},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {41},
	year = {1981},
	month = {Jan},
	pages = {133-139},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {Purchas RW and Rae AL and Barton RA and Beach AD}
}
