References
- Branford , W.C. 1878 . Report of the colonial veterinary surgeon for the year 1878 , Pretoria : Central library, Dept. Agric. Tech. Services .
- Du Toit , P.J. 1928 . Investigations into the cause of Vermeersiekte in sheep , 13th and 14th Report, Director of Vet. Educ. and Res. Part I Pretoria : Govt. Printer .
- Grosskopf , J.F.W. 1964 . Our present knowledge of “Vermeersiekte” , Pretoria : Tech. Commun. 21, Dept. Agric. Tech. Services .
- Morris , J.J. 1944 . “Vermeerbos” problem , Agricultural Production, Publicity Series No. 12 Pretoria : Union of S.A. Govt. Print .
- Steyn , D.G. 1943 . “Vermeersiekte” in stock . Fmg. in S. Afr. , 18 : 747 – 758 .
- Tidmarsh , C.E.M. 1957 . Handbook for Farmers in S.A , Vol. III , 625 Pretoria : Govt. Printer .
- Van der Schijff , H.P. 1948 . ‘n Fisiologiese‐Ekologiese studie van Geigeria passerinoides (L.Her.) , Potch. Univ. vir C.H.O. . Harv. M.Sc. Thesis,