Sinha RRP, Mishra BK, Hasson MK. Birth-order and need for achievement in tribals and non-tribals. Indian J Psychiatr Soc Work [Internet]. 1975 Jul. 31 [cited 2024 Nov. 5];4(1):26–32. Available from: http://pswjournal.org/index.php/ijpsw/article/view/47