Study and difficulties of mathematics / Augustus De. Morgan. Morgan, Augustus De. A.C.T. Schools Authority (Australia) A.C.T. Schools Accrediting Agency (Australia) Science Study and teaching [Secondary] Australian Capital Territory. Mathematics Study and teaching (Secondary) Australian Capital Territory. Languages, Modern Study and teaching (Secondary) Australian Capital Territory. 510 DEO Canberra , Chicago : A.C.T. Schools Authority [for the] A.C.T. Accrediting Agency, Open Court, c1982 . c1910 . c1982 . c1910 . 1982 Text vi, 288 p. : eng Australian Capital Territory. Australian Capital Territory. Australian Capital Territory.