TY - `BOOK` AU - DeGregori, Thomas R. TI - Technology and the economic development of the tropical African frontier PB - Press of Case Western Reserve Univ. CY - Cleveland [u.a.] PY - 1969 LA - eng SE - VIII, 531 S. KW - Afrika / Wirtschaftsentwicklung CN - 70 B 2562 AN - UBHD-1076862 ER -