How hard are Enterolobium cyclocarpum (Leguminosae) seeds?

How hard are Enterolobium cyclocarpum (Leguminosae) seeds? Janzen, Daniel H. creator Higgins, M. L. text monographic Sobretiro de : Brenesia 16 : 61-67, 1979 Enterolobium cyclocarpum Semillas Dureza 16789 971013 20220329134208.0