@conference {39165,
	title = {Systems of pig production in Canterbury: An economic appraisal},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {23},
	year = {1963},
	month = {Jan},
	pages = {144-158},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {Longwill A}
}
@conference {38956,
	title = {A Plan of Pig Improvement Applicable to N.Z. Conditions},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {11},
	year = {1951},
	month = {Jan},
	pages = {48-56},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {Longwill A}
}
