CLIFFORD, P. Research in white clover seed production. NZGA: Research and Practice Series, [S. l.], v. 1, p. 64–67, 1980. DOI: 10.33584/rps.1.1979.3285. Disponível em: https://www.nzgajournal.org.nz/index.php/rps/article/view/3285. Acesso em: 13 nov. 2026.