by Benito Ching Tan , L. B. Cardenas , N. K. Torreta
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A preliminary study on the affinities of...
Winona H. Welch Herbarium of Hookeriacea...
Guide to the bryophytes in the Limestone...
Notothylas breutelii, a Caribbean specie...
Additional notes on Asiatic and Pacific ...
Thamnobryum subserratum and T. subseriat...
Isotopic studies of Azolla and nitrogen ...
Practical application of azolla for rice...
International bibliography on Azolla
Untersuchungen u⁺ber die Wechselwirkunge...
A Tertiary Azolla from British Columbia
Ueber Azolla