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- [2] FERTILIZATION OF 2 LETTUCE (LACTUCA-SATIVA L) CULTIVARS WITH POTASSIUM AND BORON AGRONOMIA COSTARRICENSE, 1979, 3 (02): : 197 - 199
- [5] THE REACTION OF LETTUCE (LACTUCA-SATIVA L) CULTIVARS TO CUCUMBER MOSAIC-VIRUS JOURNAL OF AGRICULTURAL SCIENCE, 1985, 105 (OCT): : 291 - +
- [6] DIFFERENTIATION OF LETTUCE CULTIVARS (LACTUCA-SATIVA VAR CAPITATA) - PRELIMINARY-REPORT GARTENBAUWISSENSCHAFT, 1980, 45 (03): : 116 - 120
- [8] OCCURRENCE OF AMEBAS ON OAK LEAF LETTUCE (LACTUCA-SATIVA VAR CRISPA) AND BOSTON LETTUCE (LACTUCA-SATIVA VAR CAPITATA) JOURNAL OF PROTOZOOLOGY, 1984, 31 (03): : 454 - 455