| the hygiene and marketing of fresh cream as assessed by the methylene blue test. a report by a working party to the director of the public health laboratory service. | the hygiene and marketing of fresh cream in england and wales was investigated by a working party of the public health laboratory service (phls) between 1 october 1968 and 31 july 1969. thirty-one cream-producing dairies were visited and observations made in the light of the code of practice published by the milk and milk products technical advisory committee of the ministry of agriculture, fisheries and food, and the scottish home and health department. suggestions are made in this report to st ... | 1971 | 4326247 |