Petroleum times.

v.1, no.2-25(1919:Jan.18-Jun.28); v.2, no.26-51(1919:Jul.5-Dec.27); v.3, no.52-77(1920:Jan.3-Jun.26); v.4, no.78-103(1920:Jul.3-Dec.25); v.5, no.104-129(1921:Jan.1-Jun.25); v.6, no.130-156)(1921:Jul.2-Dec.31); v.7, no.157-181(1922:Jan.7-Jun.24); v.8, no.182-208(1922:Jul.1-Dec.30); v.9, no.209-234(1923:Jan.6-Jun.30); v.10, no.235-260(1923:Jul.7-Dec.29); v.16 Jul-Dec; v.73, no.1876-1887 (Bd. w/o 1886); v.1 1919; v.2 1919; v.3:no.52-77 (1920); v.6 1921; v.6 no.131 1921 Jul; v.6 no.132 1921 Jul; v.6 no.134 1921 Jul; v.6 no.135 1921 Aug; v.6 no.136 1921 Aug; v.6 no.137 1921 Aug; v.6 no.138 1921 Aug; v.6 no.139 1921 Sep; v.6 no.140 1921 Sep; v.6 no.141 1921 Sep; v.6 no.142 1921 Sep; v.6 no.143 1921 Oct; v.6 no.144 1921 Oct; v.6 no.145 1921 Oct; v.6 no.146 1921 Oct; v.6 no.147 1921 Oct; v.6 no.148 1921 Nov; v.6 no.149 1921 Nov; v.6 no.150 1921 Nov; v.6 no.151 1921 Nov; v.6 no.152 1921 Dec; v.6 no.153 1921 Dec; v.6 no.154 1921 Dec; v.6 no.155 1921 Dec; v.6 no.156 1921 Dec; v.7 1922; v.7 1922 Jan-Jun; v.8 1922; v.8 1922 Jul-Dec; v.9 1923 Jan-Jun; v.10 1923 Jul-Dec; v.11 1924 Jan-Jun; v.11, no.261-286 (1924:Jan.5-Jun.28); v.12 1924 Jul-Dec; v.12, no.287-312 (1924:Jul.5-Dec.27); v.13 1925 Jan-Jun; v.13, no.313-338 (1925:Jan.3-Jun.27); v.14 1925; v.14, no.339-364 (1925:Jul.4-Dec.26); v.15 1926; v.15, no.365-389 (1926:Jan.2-Jun.26; v.16, no.390-415 (1926:Jul.3-Dec.25); v.17 1927 Jan-Jun; v.18 1927 Jul-Dec; v.19 1928 Jan-Jun; v.20 1928 Jul-Dec; v.21 1929 Jan-Jun; v.22 1929 Jul-Dec; v.50 Jan.-June 1946; v.56 1952; v.57 1953 Jan-Jun; v.57 1953 Jul-Dec; v.58 1954 Jan-Jun; v.58 1954 Jul-Dec; v.59 1955 Jan-Jun; v.59 1955 Jul-Dec; v.60 1956 Jan-Jun; v.60 1956 Jul-Dec; v.61 1957 Jan-Jun; v.61 1957 Jul-Dec; v.62 1958 Jan-Jun; v.62 1958 Jul-Dec; v.63 1959 Jan-Jun; v.63 1959 Jul-Dec; v.64 Jan.-June 1960; v.64 1960 Jan-Dec; v.64 1960 Jul-Dec; v.65 1961 Jan-Jun; v.65 1961 Jul-Dec; v.66 1962 Jan-Jun; v.66 1962 Jul-Dec; v.67 1963 Jan-Jun; v.67 1963 Jul-Dec; v.68 1964 Jan-Jun; v.68 1964 Jul-Dec; v.69 1965 Jan-Jun; v.69 1965 Jul-Dec; v.70 196