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Data are reported on 1692 plant extracts which were tested in the primary screens of the Cancer Chemotherapy National Service Center. Almost all the materials were tested in Sarcoma 180, Adenocarcinoma 755, Leukemia 1210, and KB cells in culture; some tests were also carried out in Friend virus leukemia, Lewis lung carcinoma, Human sarcoma HS1, and Walker 256 (intramuscular). Data are reported only on materials that have not demonstrated sufficient activity in these systems to warrant further investigation.
1 National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
2 National Library of Medicine, Bethesda, Maryland.
3 Crops Research Division, Agriculture Research Service, U. S. Department of Agriculture, Beltsville, Maryland.
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