APA

Annamma Y, Licy J, Marattukalam J G, Panikkar A O N, Premakumari D & Saraswathyamma C K. (1990). Promising rubber planting materials with special reference to Indian clones. : Planters Conference, 19 April 1990, Kottayam, India. pp. 62-70.

Chicago

Annamma Y, Licy J, Marattukalam J G, Panikkar A O N, Premakumari D and Saraswathyamma C K. 1990. Promising rubber planting materials with special reference to Indian clones. : Planters Conference, 19 April 1990, Kottayam, India. pp. 62-70.

Harvard

Annamma Y, Licy J, Marattukalam J G, Panikkar A O N, Premakumari D and Saraswathyamma C K. (1990). Promising rubber planting materials with special reference to Indian clones. : Planters Conference, 19 April 1990, Kottayam, India. pp. 62-70.

MLA

Annamma Y, Licy J, Marattukalam J G, Panikkar A O N, Premakumari D and Saraswathyamma C K. Promising rubber planting materials with special reference to Indian clones. : Planters Conference, 19 April 1990, Kottayam, India. pp. 62-70. 1990.