| | | | | | 2010 |
| | Al-Hajj, H and Fischer, A. | | | | 2008 |
| | Eshbailat, S., Al-Hajj, H. , and Ibrahimi, I., | Dirasat, univ. of Jordan Res. Bull., | Vol. 2: 103-114 | | 2004 |
| | Tahtamoni, Al-Hajj, H., Bata, M. | Mid. East Fertility Soc. J, | 7:209-213. | | 2002 |
| | Al-Disi, N., Salhab, A., and Al-Hajj, H. | mice. J. Ethnopharmacology | 77:117-121. | | 1999 |
| | Younis, N and Al-Hajj, H. | Abstract. Second International Conference on Science & Environment, Al-Azhar University, Cairo, Egypt. | | | 1997. |
| | Al-Hajj, H., and Attiga, F. | Invertebrate Reproduct. and Develop. | 28(2):113-124. | | 1995 |
| | | Dirasat, Univ. of Jordan Res. Bull. | 19(2): 35-46. | | 1992. |
| | Talbot. P., Poolsanguan, W., Poolsanguan, B., and Al-Hajj, H. | | 258:104-112. | | 1991. |
| | Talbot, P., Poolsanguan, B., Al-Hajj, H., and Poolsanguan, W. | | 106:125-134. | | 1991. |
| | Al-Hajj, H., Howard, D. , Demers, D. and Talbot, P. | | 111: 410a. | | 1991 |
| | | | 8(2):153-162. | | 1990. |
| | Abu-Rajab, A., Amr, S., Hamzeh, Y., and Al-Hajj, H. | | 10(1):69-74. | | 1990. |
| | Lutfy, R., and Al-Hajj, H. | | 7(3):185-201. | | 1989. |
| | | Internat.J.Inverteb. Reprod. Develop. | 13(3):281-295. | | 1988. |
| | Shraideh, Z., Al-Hjj, H., and Deesi, A. | Dirasat .Univ. of Jordan Res. Bull. | 15:69-83. | | 1988. |
| | | Internat. J.Inverteb. Reprod. Develop. | 12:295-306. | | 1987. |
| | | Univ. of Jordan Res. Bull. | 14:9-24. | | 1987. |
| | Musa, A., Al-Hajj, H., and Monayer, L. | Dirasat. Univ. of Jordan Res.Bulletin. | | | 1987. |
| | Al-Hajj, H., Janakat, S., and Mahmoud, F. | | 65:2959-2968. | | 1987 |
| | Al-Hajj, H., Janakat, S., and Fahmi, M. | Arab Gulf J.Scient. Res.B | 5(3):471-487. | | 1987 |
| | Amr, S., Shihabi, N., and Al-Hajj, H. | | 5: 266-269. | | 1984. |
| | Amr, S., Farah, G., Muhtaseb, H. and Al-Hajj, H. | | 10: 59-65. | | 1984. |
| | Amr, S., Tuokan, A., Ajlouni, K. and Al-Hajj, H. | | 16(2):159-167. | | 1982. |
| | | | 31:21-31. | | 1981. |
| | | Dirasat, Univ. of Jordan Res. | 8(1):152-177 | | 1981. |
| | | Dirasat, Univ. of Jordan Res. Bull. | 8(1): 152-177 | | 1980. |
| | | | 30:121-129. | | 1980. |
| | Hinsch, G., and Al-Hajj, H. | | 14(2):179-188. | | 1975. |
| | | University of Houston, Houston, Texas, U.S.A. | | | 1974. |
| | | M.Sc. Thesis. American University of Beirut. Beirut, Lebanon. | | | 1966. |
| | Al-Hajj, H and Fischer, A. | | | | 2009 |
| | Tahtamoni, Al-Hajj, H., Bata, M. | Mid. East Fertility Soc. J, | 7:209-213. | | 2002. |
| | Shraideh, Z., Wehbeh, M., and Al-Hajj, H. | Dirasat, Univ. of Jordan Res. Bull., Pure Sciences, | 26(1):62-73. | | 1999. |
| | Attiga, F. and Al-Hajj, H. | | . 38(1-2):47-58. | | 1996. |
| | Talbot, P., Al-Hajj, H., Demers, D., and Howard, D. | | 110: 329-338. | | 1991. |