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Dawson, P. A. (1972). Observations on the structure of some forms of Gomphonema parvulum Kütz. I. Morphology based on light microscopy, and transmission and scanning electron microscopy. British Phycological Journal. 7(2): 255-271.
Dawson, P. A. (1972). Observations on the structure of some forms of Gomphonema parvulum Kütz. I. Morphology based on light microscopy, and transmission and scanning electron microscopy. British Phycological Journal. 7(2): 255-271.
