APA
Punjab I. A. D. P., Punjab I. A. D. P., . (1978). Study to assess the impact of various factors upon the yield of wheat crop in Ludhiana District. Ludhiana: Information Unit I A D P Punjab.
Chicago
Punjab Intensive Agricultural Distric Programme, Punjab Intensive Agricultural Distric Programme, . 1978. Study to assess the impact of various factors upon the yield of wheat crop in Ludhiana District. Ludhiana: Information Unit I A D P Punjab.
Harvard
Punjab I. A. D. P., Punjab I. A. D. P., . (1978). Study to assess the impact of various factors upon the yield of wheat crop in Ludhiana District. Ludhiana: Information Unit I A D P Punjab.
MLA
Punjab Intensive Agricultural Distric Programme, Punjab Intensive Agricultural Distric Programme, . Study to assess the impact of various factors upon the yield of wheat crop in Ludhiana District. Ludhiana: Information Unit I A D P Punjab. 1978.
