Lal, B. (1965). Industrial productivity & eco. growth. Chaitanya Pub. House.
Lua i Stíl Chicago (17ú heag.)Lal, B. Industrial Productivity & Eco. Growth. Allahabad: Chaitanya Pub. House, 1965.
Lua MLA (9ú heag.)Lal, B. Industrial Productivity & Eco. Growth. Chaitanya Pub. House, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.