Cita APA

American Society of Agronomy, National Fertilizer Association (1925- ), & Bear, F. E. 1. (1949). Hunger signs in crops: A symposium American Society of Agronomy and National Fertilizer Association.

Citación estilo Chicago

American Society of Agronomy, National Fertilizer Association (1925- ), and Firman E. 1884-1967 Bear. Hunger Signs in Crops: A Symposium. [Rev., i.e. 2nd, ed.]. Washington: American Society of Agronomy and National Fertilizer Association, 1949.

Cita MLA

American Society of Agronomy, National Fertilizer Association (1925- ), and Firman E. 1884-1967 Bear. Hunger Signs in Crops: A Symposium. [Rev., i.e. 2nd, ed.]. Washington: American Society of Agronomy and National Fertilizer Association, 1949.