IX International Horticultural Congress, London, August 7th to 15th 1930. Programme of the Congress.

MLA

Ix International Horticultural Congress, London, August 7th to 15th 1930. Programme of the Congress. London: Royal Horticultural Society, 1930.

APA

(1930). IX International Horticultural Congress, London, August 7th to 15th 1930. Programme of the Congress. London: Royal Horticultural Society.

Chicago

IX International Horticultural Congress, London, August 7th to 15th 1930. Programme of the Congress. London: Royal Horticultural Society, 1930.