Micro-organisms in water : their significance, identification and removal, together with an account of the bacteriological methods employed in their investigation / ... By Percy Frankland and Mrs. Percy Frankland.

Licence: Public Domain Mark

Credit: Micro-organisms in water : their significance, identification and removal, together with an account of the bacteriological methods employed in their investigation / ... By Percy Frankland and Mrs. Percy Frankland. Wellcome Collection. Source: Wellcome Collection.