1. Burton, G.W. and De Vane, E.H. (1953). Estimating hereditary in tall fescue (Festuca arundinacea) from replicated clonal material. Agronomy Journal, 45:478-481. https://doi.org/10.2134/agronj1953.00021962004500100005x
2. Dadhwal, K.S.; Narain, P. and Dhyani, S.K. (1989). Agroforestry systems in Garhwal Himalaya. Agroforestry Systems, 7:213-225. https://doi.org/10.1007/BF00046970
3. Gaur, R.D. (1999). Flora of the District Garhwal North West Himalaya (With Ethnobotanical Notes). Transmedia Publication Centre, Srinagar Garhwal – 246 174, pp. 811.
4. Holm, S.O. (1994). Reproductive patterns of Betula pandula and B. pubescens along a regional altitudinal gradient in northern Sweden. Ecography, 17:60-72. https://doi.org/10.1111/j.1600-0587.1994.tb00077.x
5. Iskik, K. (1986). Altitudinal variation in Pinus brutia Ten: Seed and seedling characteristics. Silvae Genetica, 35:58-67.
6. Jain, S.K. (1982b). Variation and adaptive role of seed dormancy in some annual grassland species. Botanical Gazetteer, 143(1):101-106. https://doi.org/10.1086/337276
7. Johnson, H.W.; Robinson, H.F. and Comstock, R.F. (1955). Estimates of genetic and environmental variability in soyabean. Agronomy Journal, 47:314-318. https://doi.org/10.2134/agronj1955.00021962004700070009x
8. Lohan, O.P.; Lal, D.; Pal, R.N. and Negi, S.S. (1980). A note on tannins in tree fodders. Indian Journal Animal Science, 50:881.
9. Lusk, C.H. (1995). Seed size, establishment sites and species co-existence in a chilean rain forest. Journal of Vegetation Science, 6:249-256. https://doi.org/10.2307/3236220
10. Manga, V.K. and Sen, D.N. (1996). Genetic parameters for seed traits in P. cineraria (L.) Macbride. Indian Journal Forestry, 19:148-151.
11. Mikhailov, V. (1987). Variation in the dimensions, weight and form of seeds of Pinus nigra in the Slavyanka mountains. Gorskostopanska, Nauka, 24:26-37.
12. Negi, S.S. (1986). Foliage from forest trees – A potential feed resource. In: Khosla, P.K. et al. (eds.) Agroforestry Systems A New Challenges, pp. 111-120. Indian Society of tree Scientists, Solan, H.P., India.
13. Ponamal, N.R.; Arjunan, M.C. and Anthony, K.A. (1993). Seedling growth and biomass production of Hardwickia binata Roxb. as effected by seed size. Indian Forester, 119:59-62.
14. Purohit, A.N. and Nautiyal, A.R. (1987). Fuelwood value index of Indian mountain tree species. International Tree Crops Journal, 4:177-182. https://doi.org/10.1080/01435698.1987.9752821
15. Todaria, N.P. and Bhatt, B.P. (1990). Some multipurpose tree taxa of Garhwal Himalaya. In: Pathak, P.S. et al. (eds.) MPTS for Agroforestry Systems. Range Management Society of India. I.G.F.R.I., Jhansi, pp. 37-41.
16. Turnbull, J. (1975). Seed collection – sampling consideration and collection techniques. In: Report of the FAO/DANIDA Training course of forest seed collection and handling held in Chiang Mai, Thailand. February-March, FAO/TF/RAS – 11 (DEN.), FAO, Rome.
17. Vera, M.L. (1997). Effects of altitude and seed size on germination and seedling survival of healthland plants in north Spain. Plant Ecology, 133:101-106. https://doi.org/10.1023/A:1009729201384
18. Wang, B.S.P.; Pitel, J.A. and Webb, D.P. (1982). Environmental and Genetic factors affecting tree and shrub seeds. In: Thomson, J.r. (ed.). Advances in Research and Technology of Seeds. Part 7. Centre for Agricultural Publishing and Documentation, Wageningen, Netherlands, pp. 87-135.