Proceeding of National colloquium on potato mechanization in India [held at] department of farm power and machinery college of agricultural engineering Punjab Agricultural University Ludhiana and Punjab, chapter of I.S.A.E. Nov., 11-12, 1992 - Verma, S.R., ed.; Ahuja, S.S., ed.; Sharma, V.K., ed.; Singh, Santokh, ed.; Singh, Surendra, ed. (Punjab Agricultural University Ludhiana, 1992)