TY  - BOOK
AU  - Tio,Marco Antonio
TI  - Photoperiodic responses of sugar-cane in Puerto Rico
PY  - 1952///
KW  - Sugar cane
KW  - Puerto Rico
KW  - Field experiments
KW  - Local
KW  - Plant photoperiodism
N1  - Thesis (Ph.D.)--Pennsylvania State College, 1952; Bibliography: leaves 77-84; Photocopy; Ann Arbor, Mich; University Microfilms; 1983; 21 cm
ER  -