الفترة:
الموضوعات: الأسمدة؛ المعادن؛ ورقلة (ولاية)؛ الزراعة؛ النباتات
Subjects: Mathematical models
Subjects: Aerodynamics
Subjects: Africa South of Sahara; Management; Natural resources
Subjects: Algeria
Subjects: Cutting; Geomagnetism; Machining; Magnetic fields; Minerals
Subjects: Algeria; Plants
Subjects: Elasticity; Mathematical models; Mathematics
Subjects: Algeria; Forage plants; Pastures
Subjects: Building materials; Evaluation
Subjects: Analytical chemistry; Light; Optical properties; Optics; Spectrometers