Du Toit, B.A.; Smuts, D.B.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
By means of nitrogen metabolism experiments, the biological values of 94 for white fishmeal, 81 for crayfishmeal, 71 for fishmeal, 67 for meatmeal, 67 for meat and bonemeal and 63 for whale and fishmeal were determined. ...