TY - BK AU - Horton,D. TI - Underground crops long-term trends in production of roots and tubers SN - 0-933595-19-0 U1 - 633.4 PY - 1988/// CY - Morrilton, AR (USA) PB - Winrock International, KW - Colocasia esculenta KW - Economic plants KW - Ipomoea batatas KW - Manihot esculenta KW - Potatoes KW - Root crops KW - Solanum tuberosum KW - Yams N1 - Tables ER -