May et al., 1971. Can. J. Anim. Sci., 51: 271-278 Document reference May, R. W. ; Bell, J. M., 1971. Digestible and metabolizable energy values of some feeds for the growing pig. Can. J. Anim. Sci., 51: 271-278Web http://dx.doi.org/10.4141/cjas71-040Citation key May et al., 1971