TY  - JOUR
T1  - On a New Method of Estimating the Aperture of Stomata
JF  - Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934)
VL  - 84
IS  - 569
SP  - 136
EP  - 154
PY  - 1911/07/20/
UR  - http://dx.doi.org/10.1098/rspb.1911.0058
M3  - doi:10.1098/rspb.1911.0058
AU  - Darwin, F.
AU  - Pertz, D.
ER  -