"lock, g w. "
sisal: / g.w. lock - 2 ed. - tanzania : longman 1969. - "xix, 365p.; 22 cm." - tropical agriculture .
582 4605 4 hard cover
633. 577 loc
sisal: / g.w. lock - 2 ed. - tanzania : longman 1969. - "xix, 365p.; 22 cm." - tropical agriculture .
582 4605 4 hard cover
633. 577 loc