Vegetable productivity :
Spedding, C. R. W. ed.
Vegetable productivity : the role of vegetables in feeding people and livestock; proceedings of a symposium held at the Royal Geographical Society, London on 27-28 September 1979 / edited by C. r. W. Spedding. - London : Macmillan, 1981. - 268 p. : ill. ; 24 cm. - Symposia of the Institute of Biology .
Open access.
Vegetables--Congresses.
Vegetable productivity : the role of vegetables in feeding people and livestock; proceedings of a symposium held at the Royal Geographical Society, London on 27-28 September 1979 / edited by C. r. W. Spedding. - London : Macmillan, 1981. - 268 p. : ill. ; 24 cm. - Symposia of the Institute of Biology .
Open access.
Vegetables--Congresses.