Human in vitro system for the detection of uterine cervical preinvasive carcinoma.

1344 The Transport and Localization of Benzo(a) pyrene-Hematite and Hematite@2LOPo in the Hamster Lung following Intratratheal Instilla tion. Ann R. Kennedy and John B. Little. 1353 Comparison of the L-Asparaginases from Escherichia co/i and Erwinia carotovora as Immunosuppressa nts. Leslie A. E. AshworthandAlasiair P. MacLennan. 1360 The Binding of Tritium-labeled Phorbol Esters to the Macromolecular Constituents of Mouse Epidermis. C. Tucker Helmes, Tove Hilksund, and R. K. Bout well. 1366 Modulation of Fetal Antigen(s) in Mouse Leu kemia Cells, John R. Ortaldo,C. C. Ting,andR. B. Herberman. 1372 Data from Eleven United Statesand Canadian Colleges of Veterinary Medicine on Pancreatic Carcinoma in Domestic Animals. w. A. Priester. 1376 @ In Vitro Determination of Thymidine-3H Labeling Index in Human Solid Tumors. Robert B. Livingston, Ulo Ambus, Stephen L. George, Emil J Freireich, and Jacqueline S. Hart. 1381 $-Aminoisobutyric Acid, a New Probe for the Metabolism of DNA and RNA in Normal and Tumorous Tissue. Henrik Rist Nielsen, Knud-Erik SjÃ3lin, Kaare Nyholm, B. S. Baliga, Rosemary Wong, and Ernest Borek. 1385 A Scanning Microscope Study of the Topog raphy of HeLa Cells. Keith R. Porter, Virginia Fonie, and Gary Weiss. 1395 Prolonged Remissions of Lymphatic Leukemia in DBA/2 Mice Induced with Endogenously Produced Lactate Dehydrogenase Antibody. George Lakatos, Aaron Sirefling, Ramon R. Joseph, and Daisy S. McCann. 1401 Correlations between the DNA Content Dis tribution and Tritiated Thymidine Studies in Relation to Population Size in Sarcoma 180 in Vitro. S. E. Shackney and S. S. Ford. 1408 Concanavalin A-induced Agglutination and ff@(Viae@us \9l@@\\