共 18 条
[11]
1973, INDIAN EXPRESS 0205
[12]
1973, MAINSTREAM, P89
[13]
1970, PAKISTAN DEVELOPMENT, V10, P413
[14]
1966, INDUSTRIAL RESEARCH, V1, P72
[15]
1972, GAP BETWEEN RICH POO, P49
[16]
1973, APPROACH 5TH PLAN 19, P47
[17]
1971, WORLD PLAN ACTION AP
[18]
1973, APPROACH SCIENCE TEC, P3