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Tests on scarifier points showed that methods of treating them to prolong their life had little effect.
Lester, C R.
"There's little to choose between scarifier points,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 20
, Article 3.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol20/iss2/3