Accompanied by 6 foldout plates -- Plate 1 : Occurrence of Athleta petrosa stock in Texas. Plate 2 : Evolution of Athleta petrosa stock. Plate 3 : Summary histograms of measured and computed data. Plate 4 : Fortran Program I for calculating statistical summary of primary and secondary data. Plate 5 : Fortran Program II for plotting scatter diagrams and cumulative curves. Plate 6 : Contoured scatter diagrams of Athleta petrosa stock
vi, 117 p., 11 leaves of plates : ill., map ; 26 cm.