Bloch, E.W. Old mutual /cabs : Zimbabwe income tax guide 1997-1998 / by BLOCH, E.W and BLOCH, H. - Durban : Butterworths, 1997. - ix, 144p. : ill. Guide to income tax, capital gains tax and sales tax. ISBN: 0409116777 Subjects--Topical Terms: Income tax.Income tax.