"0balla, e r. "
technical drawing and design: / e.r. 0balla - ed. - kenya : heinemann kenya 1988. - ", 110p.; 21 cm."
9966-46-936-2
--
604. 2 oba
technical drawing and design: / e.r. 0balla - ed. - kenya : heinemann kenya 1988. - ", 110p.; 21 cm."
9966-46-936-2
--
604. 2 oba